Placoid



[plak-oid] /ˈplæk ɔɪd/

adjective
1.
platelike, as the scales or dermal investments of sharks.
/ˈplækɔɪd/
adjective
1.
platelike or flattened
2.
(of the scales of sharks and other elasmobranchs) toothlike; composed of dentine with an enamel tip and basal pulp cavity

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