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Discover LudwigThe phrase "a thumbprint" is correct and usable in written English.
You can use it when referring to the unique pattern of ridges and lines on a person's thumb, often in the context of identification or security.
Example: "The security system requires a thumbprint for access to the building."
Alternatives: "a fingerprint" or "a digital print".
Exact(60)
The company chose a thumbprint for a logo.
Also, each of us had to leave a thumbprint.
A Manchester school library will use a thumbprint scanner to authorize student book loans.
Quite a few of them were illiterate, and signed their weekly pay receipts with a thumbprint.
He can use the number, along with a thumbprint, to identify himself anywhere in the country.
Before the Hahn trial, rumors surfaced that there was a thumbprint in the paint.
He added, "A thumbprint or fingerprint scan would be a good idea".
Where the ballots call for a thumbprint, he marks his with his big toe.
Many of their passports had been signed by the illiterate with a thumbprint.
"We love you," declared another slogan, printed over a thumbprint in the national colours.
It's like a thumbprint, a tiny yet accurate key to a whole identity.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com