[phonypc]

Fish and reptile aren't comparable terms to dinosaur. They started as colloquial terms and (as colloquially used) refer to groups based on traits, not phylogeny. Humans actually are not evolved from the phylogenetic group closest in content to "reptiles."

I guess you could argue the colloquial definition of dinosaur is similarly trait based, but even then... an ostrich is practically a small toothless T. rex.