noun \ˈärch\

Definition of ARCH

: an anatomical structure that resembles an arch in form or function: as a : either of two vaulted portions of the bony structure of the foot that impart elasticity to it: (1) : a longitudinal arch supported posteriorly by the basal tuberosity of the calcaneus and anteriorly by the heads of the metatarsal bones (2) : a transverse arch consisting of the metatarsals and first row of tarsals and resulting from elevation of the central anterior portion of the median longitudinal arch b : arch of the aorta
: a fingerprint in which all the ridges run from side to side and make no backward turn

Illustration of ARCH

Seen & Heard

What made you want to look up arch? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More