crossopterygian

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any fish of the order Crossopterygii;
most known only in fossil form
• Syn:
lobefin, lobe-finned fish
• Hypernyms:
bony fish
• Hyponyms:
coelacanth, Latimeria chalumnae
• Member Holonyms:
Crossopterygii, subclass Crossopterygii