We found one dictionary that defines the word thumb and finger rule:

General (1 matching dictionary)

1. thumb-and-finger rule: Merriam-Webster

▸ Words similar to thumb and finger rule ▸ Usage examples for thumb and finger rule ▸ Idioms related to thumb and finger rule ▸ Wikipedia articles (New!) ▸ Words that often appear near thumb and finger rule ▸ Rhymes of thumb and finger rule ▸ Invented words related to thumb and finger rule