thumb.hole

thumbhole的音标和读音：
DJ音标发音： [ˈθʌmˌhoul]
KK音标发音： [ˈθʌmˌhol]

thumbhole的词性：
n.（名词）

1. An opening made to fit a thumb, as in a bowling ball.
拇指孔：（保龄球）上供拇指插入的孔

2. Music The hole on a wind instrument that is opened or closed with the thumb.
【音乐】 管乐器上由拇指控制其开关的孔