killer whale

noun
any of several predatory dolphins, especially the black-and-white Orcinus orca, found in all seas.

Origin:
1880–85

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World English Dictionary
killer whale
 
n
killer, grampus, Also called: orc a predatory black-and-white toothed whale, Orcinus orca, with a large erect dorsal fin, most common in cold seas: family Delphinidae

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
It's not as if you can figure out the intention of a killer whale while it's hunting for seals with younger whales.
Check out the killer whale skeleton and the dinosaur fossil collections.
The draft status report for the killer whale was reviewed by researchers and state, provincial, and federal agencies.
Observations on the birth and development of a captive-born killer whale.
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