plac·oid /ˈplæˌkɔɪd/
(a.)盾鱗狀的有盾鱗的魚
Plac·oid a. Zool. Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoids.
Plac·oid, n. Zool. (a) Any fish having placoid scales, as the sharks. (b) One of the Placoides.
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placoid
adj : as the hard flattened scales of e.g. sharks [syn: platelike]