digit
/ˈdɪdʒɪt/noun
1
- any of the numerals from 0 to 9, especially when forming part of a number（0到9的任一）数字; 数位, 位。
2
- a finger or thumb手指; 拇指。
2.1
- Zoology an equivalent structure at the end of the limbs of many higher vertebrates【动】指趾。
词源
late Middle English: from Latin digitus 'finger, toe'; sense 1 arose from the practice of counting on the fingers.