placoid

形容词 placoid:

1. as the hard flattened scales of e.g. sharks
   同义词：platelike

plac.oid

adj.（形容词）
Platelike, as the hard toothlike scales of sharks, skates, and rays.
楣形的：盘状，如鲨鱼、恶鱼和虹鱼的硬齿状的鳞

来源：
Greek plax plak- [flat land, surface] * see pl3k-
希腊语 plax plak- [表面] *参见 pl3k-
-oid
-oid