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Webster 1913 Edition
Placodermi
‖
Placˊo-der′mi
,Noun.
pl.
[NL., fr. Gr.
πλάξ
, πλακός
, a tablet + δέρμα
skin.] (Paleon.)
An extinct group of fishes, supposed to be ganoids. The body and head were covered with large bony plates. See Illust. under
Pterichthys
, and Coccosteus
.