Study of fingerprints [no repeated letters]

• The study of the whorls and loops and arches in the fingertips and on the palms of the hand and the soles of the feet

WordNet Word definitions in WordNet
n. the study of the whorls and loops and arches in the fingertips and on the palms of the hand and the soles of the feet; "some criminologists specialize in dermatoglyphics"

Wikipedia Word definitions in Wikipedia
Dermatoglyphics (from ancient Greek derma=skin, glyph =carving) is the scientific study of fingerprints , lines, mounts, and shapes of hands. Dermatoglyphics refers to the formation of naturally occurring ridges on certain body parts, namely palms, fingers, ...

Wiktionary Word definitions in Wiktionary
n. 1 The patterns of loops, arches and whorls on the skin of the fingers and feet. 2 The study of such patterns.