metatarsal

The Greek word tarsos (ταρσός) named the flat of the foot, the open weave of a basket, and the broad flat part of anything. Applied to anatomy, it named the region between the ankle and the ball of the foot. The prefix meta (μετά), meaning after or beyond, created metatarsos (μετάταρσος): the region beyond the flat of the foot.

Galen used the term in the 2nd century CE, describing the metatarsals as the foot's counterpart to the metacarpals in the hand. The parallel was deliberate. Galen saw the hand and foot as homologous structures and built his vocabulary to reflect that symmetry. Metatarsus entered Latin anatomical writing through his texts and the translations that carried them to medieval Europe.

The anatomical revolution of the 16th century gave metatarsals their modern precision. Vesalius illustrated the five metatarsal bones in his 1543 atlas De Humani Corporis Fabrica, noting how the first metatarsal differs markedly from the others in thickness and load-bearing function. The English adjective metatarsal followed in the 17th century, built from New Latin metatarsalis.

Stress fractures of the metatarsals became a defining injury of 19th-century soldiering, so common among recruits that physicians named them march fractures. Sustained walking on hard surfaces could silently crack these bones without a single traumatic blow. The march fracture linked ancient Greek terminology to modern military medicine and, later, to athletic training and ballet.