Definition of: pilca

(plī′kə) noun plural ·cae (-sē)
1. A fold of membrane, skin, or the like, as between the fingers.
2. Zool. A ridge, as on the outer wall of the body whorl in a shell, or on the wing covers of some beetles.
3. Pathol. A disease affecting the hair, causing it to become matted and agglutinated. [<Med. <L plicare fold]