Eumops glaucinus is medium sized compared to other species in its genus. Its color varies from black or brownish grey to chestnut. The venter is notably lighter. The snout is elongate with no noseleaf. The ears are wider than long and extend past the snout when brought forward. The tragus is 4-5mm and square across the top. The cranium is robust and longer than it is wide. A sagittal crest is present, along with a prominent occipitotemporal crest. Dental formula= 1/2 1/1 2/2 3/3 =30. The molars are succesively smaller in the toothrow with the third molar much smaller than the first two. The plagiopatagium extends to the heel. The uropatagium is moderately wide with the tail extending well beyond the margin. Eumops glaucinus has a pungent musky odor that has an unknown function.