thumbhole
美 ['θʌmˌhoʊl]
英 ['θʌmhəʊl]
- 网络塞拇指的孔；供塞入拇指的孔；指孔
复数：thumbholes
n. | 1. a hole in something such as a bowling ball into which a thumb can be inserted in order to provide a grip 2. a hole in a wind instrument that is covered and uncovered by the thumb to produce notes |