剑桥词典the small , round part in the middle of the belly that is left after the umbilical cord (= the long tube of flesh joining the baby to its mother ) has been cut at birth 臍 Unlike other mammals , the human umbilicus is clearly visible . 和其他哺乳動物不同，人類的臍肉眼清楚可見。 同義詞navel 返回 umbilicus