underpart

英 ['ʌndəpɑːt] 美 ['ʌndəˌpɑːt]

• n. 非重要构件(次要角色；下面部分)

英英释义

Noun:

1. a part lying on the lower side or underneath an animal's body;

   "the warbler has a white throat and underparts"
   "a woodland mouse with white underparts"