hydrocortisone (n.)

before vowels hydr-, word-forming element in compounds of Greek origin, meaning "water," from Greek hydro-, combining form of hydor "water" (from suffixed form of PIE root *wed- (1) "water; wet"). Also sometimes a combining form of hydrogen.

"steroid hormone found in the adrenal cortex," manufactured synthetically as an anti-inflammatory, 1949, coined by its discoverer, Dr. Edward C. Kendall, from a shortening of its chemical name, 17-hydroxy-11 dehydrocorticosterone, which is ultimately from Latin corticis (genitive of cortex; see cortical) and so called because it was obtained from the "external covering" of adrenal glands. Originally called Compound E (1936).