Definition: large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes
Similar words: gaviiform seabird
Definition: seabirds of the order Gaviiformes
Definition: someone who dives (into water)
Similar words: swimmer
Definition: a trained athlete who participates in swimming meets
Usage: he was an Olympic swimmer
Synonyms: underwater diver, diver, frogman
Definition: someone who works underwater
Similar words: explorer, adventurer
Definition: someone who travels into little known regions (especially for some scientific purpose)