psychro-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g.
psychrometrical adj.Origin: A borrowing from Greek. Etymons: Greek ψυχρο-, ψυχρός.
Etymology: < ancient Greek ψυχρο-, combining form (in e.g. ψυχρολουτεῖν to bathe in cold water: see psychrolute n.) of ψυχρός (adjective) cold (compare ψῦχος (noun) cold), of unknown origin. Compare French psychro- (formations in which are found from the first half of the 18th cent.), German psychro- (formations in which are found from at least the end of the 19th cent.).Formations are found from the second half of the 17th cent., earliest in psychrotechny n. Chiefly combining with second elements ultimately of Greek origin, although compare psychrotolerant adj., with a second element ultimately of Latin origin.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2020).