Glossary of ALL Terms for Data on EOL


labial palps
paired sensory appendages arising from the labium (a lower maxillary mouthpart) of arthropods
labile material feeder
consumers specializing in labile organic matter, which is easily metabolized; usually low molecular weight compounds, eg: simple sugars or proteins. For instance, metabolic scaling puts intense selective pressure on small organisms to ingest foods rich in labile organic matter; the residence time in a very short gut is too brief for enzymatic hydrolysis, so they specialize in rapidly metabolizable compounds.
labyrinth organ
accessory respiratory organ of fish in the suborder Anabantoidei, for air breathing
ladinian age
International Chronostratigraphic Chart:
A sheet of saline water separated from the open sea by sand or shingle banks. The sheet of water between an offshore reef, especially of coral and mainland. The sheet of water within a ring or horseshoe shaped atoll.
A body of water or other liquid of considerable size contained on a body of land.
lake bed
The ground surface that lies beneath a lake.
lake bottom mud
lake channel
lake inlet
An opening of a lake into its shore.
lake sediment
lake shore
That part of the land in immediate contact with a lake.
lake surface
having the form of a thin plate sheet or layer.
landlocked sea
A sea that is not connected with an ocean.
landscape architecture
design of outdoor areas, landmarks, and structures to achieve environmental, social-behavioral, or aesthetic outcomes
A mound of earth material, at the base of a slope and the associated scoured area.
langhian age
International Chronostratigraphic Chart:
A size quality which is relatively high
From Phenotype and Trait Ontology
large lake
large river
large river delta
larva and pupa
larvae and pupae are present
larval mode of development
last appearance
The last appearance of this taxon in the fossil record.
being or occurring at an advanced period of time or after a usual or expected time.
late adult stage
a sexually mature lifestage of an age which is relatively high
late spring
The late part of the season between the vernal equinox and the summer solstice.
late summer
The late part of the season between the summer solstice and the autumnal equinox.
late winter
The late part of the season between the winter solstice and the vernal equinox.
latent period
Length of the period before symptoms manifest.
Situated at or extending to the side.
lateral moraine
The parallel ridges of till deposited along the sides of an alglacier. The unconsolidated debris is deposited on top of the glacier by frost shattering of the valley walls and from tributary streams flowing into the valley. The till is carried along the glacial margin until the glacier melts.
resembling a thin narrow strip
The geographic latitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are north of the Equator, negative values are south of it. Legal values lie between -90 and 90, inclusive.
lava cave
A cave in a lava flow.
lava field
A feature formed by cooled lava, the molten rock that is expelled by a volcano during an eruption.
lava tunnel
A tunnel formed by the flow of molten lava, which has subsequently drained out.
lay eggs on
lays eggs in
The pound or pound-mass (lb) is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used, the most common today being the international avoirdupois pound which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces.
The liquid produced when water percolates through any permeable material. It can contain either dissolved or suspended material, or usually both.
leaf area
A leaf anatomy and morphology trait (TO:0000748) which is associated with the total area of a leaf (PO:0025034).
[database_cross_reference: POC:cooperl] [database_cross_reference: GR:pj] [database_cross_reference: PO:0025034]
leaf arrangement
phyllotaxy. A leaf morphology trait (TO:0000748) which is the arrangement of the leaves on the shoot of a plant.
leaf color
A vascular leaf anatomy and morphology trait (TO:0000748) which is associated with the color of leaf (PO:0025034).
[database_cross_reference: POC:cooperl] [database_cross_reference: GR:pj] [database_cross_reference: PO:0025034]
leaf complexity
whether a leaf is intricate or compounded
leaf lamina area
the area of the leaflet lamina in the one sided projection
leaf length
leaf mass per area
the ratio of the dry mass of a leaf to its area
leaf morphology
leaf nitrogen per dry mass
The ratio of the quantity of nitrogen in the leaf or component thereof, i.e. leaf lamina or leaflet, per respective unit dry mass
leaf shape
A leaf anatomy and morphology trait (TO:0000748) which is associated with the variation in shapes and forms of a leaf (PO:0025034).
[database_cross_reference: POC:cooperl] [database_cross_reference: GR:pj] [database_cross_reference: PO:0025034]
leaf sheddability
A plant's disposition to lose leaves by a natural process
leaf size class
leaf venation shape
leaf venation structure
similar in appearance to a leaf
A cardinal organ part that is one of the ultimate segments of a compound leaf
leafy wood soil
least concern
A taxon is Least Concern when it has been evaluated against the criteria and does not qualify for Critically Endangered, Endangered, Vulnerable or Near Threatened. Widespread and abundant taxa are included in this category.
A man-made watercourse, or makeshift aqueduct, often an artificial channel which supplies water to a watermill or its mill pond, collecting water from upstream of the mill so that the natural level of the driving water is above the level of the stream at the mill. Alternatively to may deliver water for mineral washing and concentration, irrigation or to a dye works.
A specimen or other element designated subsequent to the publication of the original description from the original material (syntypes or paratypes) to serve as nomenclatural type. Lectotype designation can occur only where no holotype was designated at the time of publication or if it is missing (ICBN Art. 7, ICZN Art. 74). [Zoo./Bot.] -- Note: the BioCode defines lectotype as selection from holotype material in cases where the holotype material contains more than one taxon [Bio.].
weight bearing and locomotive anatomical structure, usually having a columnar shape, function as extensible struts
lens eyes
Relative to pinhole eyes, lens eyes have greatly improved resolution and image brightness. The lens converges incoming rays of light, thereby reducing the angle over which each photoreceptor receives light, and forming an image focused on the retina. Most lens eyes have "accommodation"; they can focus an image either by physically moving the lens toward or away from the retina or by using eye muscles to adjust the shape of the lens.
a water body in which the accumulated water, in its totality, has very little to no directed flow
Leptosols are very shallow soils over continuous rock and soils that are extremely gravelly and/or stony. Leptosols are azonal soils and particularly common in mountainous regions.
long-stemmed, woody vine
composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi in a symbiotic relationship
An organism that lives on lichens, used most commonly for parasitic fungi.
Organism generally recognized as a single organism that consists of a fungus and an alga or cyanobacterium living in symbiotic association. Often attached to solid objects such as rocks or living or dead wood rather than soil.
Modified from PLANTS Database Growth Habits Codes and Definitions:
life cycle habit
Determined for type of life cycle being annual, binneal, perennial etc.
life span
A time quality inhering in a bearer by virtue of the bearer's expected maximum age.
life stage
The age class or life stage of the biological individual(s) at the time the Occurrence was recorded. Recommended best practice is to use a controlled vocabulary.
lift powered swimming
Hydrofoils, or fins, are used to push against the water to create a normal force to provide thrust, propelling the animal through water. The reduction of fin cross-sectional area helps to minimize drag, and therefore increase efficiency. Regardless of size of the animal, at any particular speed, maximum possible lift is proportional to (wing area) x (speed)<sup>2</sup>. Dolphins and whales have large, horizontal caudal hydrofoils, while many fish and sharks have vertical caudal hydrofoils.
light intensity
quantity of light, per unit area
light regimen
The treatment involving light in a growth chamber or other experimental conditions
A lignotuber is a woody swelling of the root crown possessed by some plants as a protection against destruction of the plant stem, such as by fire. The crown contains buds from which new stems may sprout, as well as stores of starch, that can support a period of growth in the absence of photosynthesis.
lignotuber or burl
Woody swelling at or below ground level with unspecified origin (no distinction between lignotuber and burl is reported).
A lake or estuary that is formed at the mouth of a river where flow is blocked by a bar of sediments. It can be maritime (the bar being created by the current of a sea) or fluvial (the bar being created by the flow of a bigger river at the confluence).
limed soil
A sedimentary rock composed largely of the mineral calcite.
limestone pavement
A natural karst landform consisting of a flat, incised surface of exposed limestone that resembles artificial pavement.
A shape quality inhering in a bearer by virtue of the bearer's being narrow, with the two opposite margins parallel.
linear size
lipid content
The total fat or lipid content present in a body part
a loosely defined term for substances of biological origin that are soluble in nonpolar solvents. They consist of saponifiable lipids, such as glycerides (fats and oils) and phospholipids, as well as nonsaponifiable lipids, principally steroids
plants that grow in or on rocks
litter layer
the ground layer of a forest or woodland where leaf litter or other plant matter accumulates.
litters per year
Number of litters per female per year
littoral zone
llandovery epoch
International Chronostratigraphic Chart:
A soil composed of sand, silt, and clay in relatively even concentration (about 40-40-20% concentration respectively).
The specific description of the place. Less specific geographic information can be provided in other geographic terms (higherGeography, continent, country, stateProvince, county, municipality, waterBody, island, islandGroup). This term may contain information modified from the original to correct perceived errors or standardize the description.
A spatial region or named place.
lochkovian age
International Chronostratigraphic Chart:
Self-propelled movement of a cell or organism from one location to another.
[database_cross_reference: GOC:dgh]
log10 grams
The metric unit of mass (gram) expressed on a logarithmic-scale (base 10).
Of seed bank longevity. Seed bank longevity is at least > 15 yr.
The geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are east of the Greenwich Meridian, negative values are west of it. Legal values lie between -180 and 180, inclusive.
lopingian epoch
International Chronostratigraphic Chart:
lost stream
A surface stream that disappears into an underground channel, or dries up in an arid area.
A minimum level or position or degree; less than normal in degree, intensity or amount.
low (<23)
The percentage of organic carbon divided by the percentage of total nitrogen in organic material is lower than 23.
USDA Plants database. Characteristics Data Fields.
low arctic
Zone D, per the Circumpolar Arctic Vegetation Map (CAVM Team 2003)
low life span
Decreased life span: A life span which is relatively low.
low n fixation
Plants with low nitrogen fixation. Less than 85 lb nitrogen per acre per year fixed in monoculture.
USDA PLANTS database Characteristics Data Fields.
low temperature tolerance
The minimum tolerable temperature is the lowest temperature recorded in the plant’s historical range. If this is not available, the record low January temperature recorded at climate stations within the current geographical range of the plant is used. This definition does not apply to summer annuals.
USDA PLANTS database Characteristics Data Fields.
low tide zone
The tidal zone that is mostly submerged, only being exposed at the point of low tide and for a longer period of time during extremely low tides.
low tolerance
decreased tolerance to: A tolerance quality inhering in a bearer by virtue of the bearer's decreased ability to endure a stimulus.
low-level epifaunal
Organism living on the surface of the substratum in the immediate vicinity of the seafloor.
lower confidence limit
a data item which is a lowest value bounding a confidence interval
lower cretaceous epoch
lower devonian epoch
International Chronostratigraphic Chart:
lower jurassic epoch
lower montane
a montane condition in which an altitude range falls immediately above mid-altitude forests
lower ordovician epoch
International Chronostratigraphic Chart:
lower triassic epoch
International Chronostratigraphic Chart:
ludfordian age
International Chronostratigraphic Chart:
ludlow epoch
International Chronostratigraphic Chart:
essential respiration organs in many air-breathing animals
lutetian age
International Chronostratigraphic Chart:
Luvisols are soils that have a higher clay content in the subsoil than in the topsoil as a result of pedogenetic processes (especially clay migration) leading to an argic subsoil horizon. Luvisols have high-activity clays throughout the argic horizon and a high base saturation at certain depths.
a layer within a marine water body where the rate of calcite dissolution changes rapidly with depth. The increase in the rate of calcite dissolution with depth is largely due to the concomitant fall in calcite saturation.
Löbbecke Museum Düsseldorföbbecke_Museum_Düsseldorf