Wiktionary
palmprint
n. 1 the integumentary pattern of the palm of the hand, sometimes also including that of the fingers 2 such a pattern used for identification purposes
Usage examples of "palmprint".
The door opened to his touch, reading his palmprint on the latch, and admitted him to the narrow lobby, empty except for the secretary pillar that guarded the inner doorway.
He slipped those into his pocket, and left the loft, double-sealing the palmprint lock behind him out of habit.
She had explained to Bluecloak the kinds she knew about, the little beams of light or sound that reacted if interrupted, the pressure plates, the locks that required known palmprints or retinal patterns.
Scotty noted wryly that the palmprint reader at the gate had blown out during a voltage spike.