buttock
noun /ˈbʌtək/
/ˈbʌtək/
[usually plural]- enlarge imageeither of the two round soft parts at the top of a person’s legs
- He fell down hard on his right buttock and slid along the path.
Oxford Collocations Dictionaryadjective- firm
- rounded
- bare
- …
Word OriginOld English buttuc, probably from the base of butt ‘thicker end of something’ + -ock.