: the pattern of marks made by pressing your thumb on a surface : a fingerprint made by a thumb
What made you want to look up thumbprint? Please tell us where you read or heard it (including the quote, if possible).
Take Our 10-Question Quiz
The commonly misspelled words quiz
How strong is your vocabulary?
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes