Noun
A vascular pigmented membrane projecting into the vitreous humor within the globe of the eye in birds, and in many reptiles and fishes; -- also called marsupium.
The pubic bone.
Any species of bivalve mollusks of the genus Pecten, and numerous allied genera (family Pectinidae); a scallop. See Scallop.
The comb of a scorpion. See Comb, 4 (b).
Source: Webster's dictionary