One of rib like structures in Teleosts which are not preformed in cartilage ; an uncinate process in birds ; the turned down outer margin of the elytra of certain beetles.
[Greek] Epithecal part of cingulum in diatoms; one of rib-like structures in telecosts which are not preformed in cartilage; an uncinate process in birds; the turned down outer margin of elytra of certain beetles.