umbilicus

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
脐
Unlike other mammals , the human umbilicus is clearly visible . 和其他哺乳动物不同，人类的脐肉眼清楚可见。
同义词
navel 返回 umbilicus