| placoganoid | <zoology> Pertaining to the Placoganoidei. Source: Websters Dictionary (01 Mar 1998) |
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| placoganoidei | <zoology> A division of ganoid fishes including those that have large external bony plates and a cartilaginous skeleton. Origin: NL, fr. Gr, a tablet + NL. Ganoidei. See Ganoidei. Source: Websters Dictionary (01 Mar 1998) |