An Etymological Dictionary of Astronomy and Astrophysics

The art or science of restoring or preserving health or due physical condition, as by means of drugs, surgical operations or appliances, or manipulations (Dictionary.com).

Etymology (EN): M.E. medicin, from O.Fr. medecine “art of healing, cure,” from L. medicina “the healing art; a remedy,” feminine of medicinus (adj.) “of a doctor,” from medicus “a physician;” PIE root *med- “to measure, limit, consider, advise,” → dimension; cf. Av. vi-mad- “physician;” Gk. medein “to rule;” L. meditari “think or reflect on, consider,” → meditation;
Ir. miduir “judge;” O.E. metan “to measure out.”

Etymology (PE): Pezeški, from pezešk “physician,” from
Mid.Pers. bizešk “physician,” bêšâz “medicinal;”
Av. bišaz- “to cure, heal;” cf. Skt. bhisaj- “healer, physician.”