'Placoganoidei' definitions:
Definition of 'Placoganoidei'
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Placoganoidei \Plac`o*ga*noi"de*i\, n. pl. [NL., fr. Gr. pla`x,
plako`s, a tablet + NL. ganoidei. See Ganoidei.] (Zool.)
A division of ganoid fishes including those that have large
external bony plates and a cartilaginous skeleton.
[1913 Webster]
