noun
hand print; palm and finger print
Technical term used in forensics, security, or identification contexts. Refers to the impression of the entire hand, including fingers and palm.
犯行現場で指掌紋が採取された。
Hand prints were collected at the crime scene.
指掌紋認証システムが導入された。
A hand print authentication system was introduced.
掌紋 means palm print only, whereas 指掌紋 covers both fingers and palm.
Compound of 指 (finger), 掌 (palm), and 紋 (print, pattern). The term is a modern technical coinage for hand print identification.