| Noun | 1. | Latimeria chalumnae - fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africacrossopterygian, lobefin, lobe-finned fish - any fish of the order Crossopterygii; most known only in fossil form genus Latimeria, Latimeria - type genus of the Latimeridae: coelacanth |