释义 |
plac·oid I. \ˈplaˌkȯid\ adjective Etymology: plac- + -oid 1. : consisting of a basal plate of dentine of dermal origin embedded in the skin and bearing a projecting point or spine tipped with enamel — used of an elasmobranch fish scale; compare shagreen 2. [New Latin Placoidei] : of or relating to the Placoidei II. noun (-s) Etymology: New Latin Placoidei : a fish of the group Placoidei |