but.tock
n.（名词）
Either of the two rounded prominences on the human torso that are posterior to the hips and formed by the gluteal muscles and underlying structures.半边屁股，臀部：人的躯体上位于臀部的由臀肌和下层组织构成的两个圆形突起的任何一个The analogous part of the body on certain mammals.屁股：某种哺乳动物身体上功能相似的部分buttocks The rear pelvic area of the human body. buttocks 臀部：人体上接近骨盆的部位
来源：Middle English 中古英语 from Old English buttuc [strip of land, end] * see bhau- 源自 古英语 buttuc [带状土地，末尾] *参见 bhau-
