Dermatoglyphics
WordNet
noun
(1) 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"
WiktionaryText
Noun
- the patterns of loops, arches and whorls on the skin of the fingers and feet.
- the study of such patterns
Trivia
Along with misconjugatedly, hydropneumatics, and uncopyrightable, this is the longest English isogram at fifteen letters. If plurals are allowed, the longest is the 16-lettered uncopyrightables.