dermatoglyphics

(noun) 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. Example: "Some criminologists specialize in dermatoglyphics."

(noun) the lines that form patterns on the skin (especially on the fingertips and the palms of the hands and the soles of the feet). Synonyms: dermatoglyphic.