Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
but·tocks(bŭt'oks), [TA] This word is grammatically plural.
The prominence formed by the gluteal muscles of either side.
[nā′tēz] sing. natis
Etymology: L, buttocks
natesadjective Breech, as in a breech delivery.
[L.] the buttocks.