placoid
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.plac·oid
adjective \ˈpla-ˌkȯid\Definition of PLACOID
: of, relating to, or being a scale of dermal origin with an enamel-tipped spine characteristic of the elasmobranchs
Origin of PLACOID
Greek plak-, plax flat surface
First Known Use: 1842
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