noun, plural ge·nae [jee-nee, gen-ee] /ˈdʒi ni, ˈgɛn i/. Zoology, Anatomy.
Origin of gena
Examples from the Web for genal
Length of cephalon, 40 mm.; width at genal angles, restored, about 62 mm.
Genal cca occur on blind trilobites, on trilobites with simple eyes, and on trilobites with compound eyes.
Eye-lines occur on trilobites with both simple and compound eyes, and genal cca may or may not be present in both cases.
The relation of the genal cca to the ocelli on the cheeks is best shown in the Trinucleid.
The first genal spine, or first tooth in the head-comb, is shorter in the dog-fleas of both sexes than it is in the cat-fleas.The Flea|Harold Russell