Definition of buttock in English:

buttock

Line breaks: but|tock
Pronunciation: /ˈbʌtək
 
/

noun

Origin

Old English buttuc, probably from the base of butt3 + -ock.

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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody