cetacean
Synonym discussion
Sense: noun/1
For sense 1, cetacean is the scientific umbrella word for the group that includes whales, dolphins, and porpoises. Whale and dolphin each name only part of that group, so they are narrower and more common in everyday speech. Marine mammal is broader: it also includes animals such as seals and manatees, which are not cetaceans. Use cetacean when you want a technical label for the whole whale-and-dolphin family, especially in research, conservation, or museum contexts.
Common collocations
Nouns
- cetacean species
- cetacean population
- cetacean research
- cetacean stranding
Phrases
- small cetacean
- toothed cetacean
- cetacean conservation
Etymology
Cetacean comes from Latin cetaceus, meaning something belonging to whales, and that Latin word goes back to Greek ketos, a large sea creature or whale. English kept the scientific sense, so the word is still used mainly in biology and wildlife writing for the group that includes whales, dolphins, and porpoises.