The phrase "a thumb print" is correct and usable in written English.
It can be used when referring to the impression or mark made by a person's thumb, often in contexts related to identification or security.
Example: "The police found a thumb print on the glass that could help identify the suspect."
Alternatives: "a thumbprint" or "a thumb impression".
She was identified through a thumb print on record with the Immigration and Naturalization Service.
It was signed with a thumb print, by Muhammad Amin, from the village of That Salay, in Jhok Kalay Khan.
They are now identified by a thumb print rather than a signature, because most village women are illiterate.
Ms Rausing was identified from a thumb print and the serial number of a pacemaker fitted six years earlier.
He displays sheets with details of every man in his unit, including names of family members, the number of each kind of weapon, and a thumb print.
In that case, Hoyle cautions you to check your bill before signing for it with a thumb print because "computers can make mistakes".
Hitachi has a prototype chip that fits into the groove of a thumb-print.
Radio-frequency identification (RFID) tags can be made so tiny that they fit into the groove of a thumb-print.
To create a thumb-print log-on, a user first registers with U-Match software, then grasps the mouse, which scans the thumb print several times.
The show's third broker, Ryan Serhant of Nest Seekers, charms an Asian heiress into hiring a professional organizer to deal with a bedroom stuffed with 800 pairs of shoes and dozens of high-priced jackets and gowns (the room is locked so that only she can enter by using a thumb-print entry pad).
Furthermore, Biff's payment of his taxi ride with a thumb-print isn't totally dissimilar to how we now hail cars and cashlessly pay for them using Uber, Hailo, Lyft and innumerable other pick-up services.
