PLACOIDEAN
\plˈakɔ͡ɪdˌi͡ən], \plˈakɔɪdˌiən], \p_l_ˈa_k_ɔɪ_d_ˌiə_n]\
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A term applied to an order of fishes characterised by having their skins covered irregularly with plates of enamel, either of considerable size or reduced to small points-this order includes skates, rays, dogfish, and sharks.
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Pert. to the placoids.
By Stormonth, James, Phelp, P. H.
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