Atlantic bottlenose dolphin at·lan·tic·bottlenosedolphin uncommon noun 1. the most common dolphin of northern Atlantic and Mediterranean; often kept captive and trained to perform SynonymsAtlantic bottlenose dolphinTursiops truncatus Related words Broader terms bottlenose dolphin WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.