Liberal Dictionary English Dictionary
- a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words: infrasonic; infrared.
prefix
- below; beneath; afterinfrasonic; infralapsarian
word-forming element from Latin infra (adv., prep.) “below, underneath, beneath; later than, smaller, inferior to,” from PIE *ndher “under” (cf. Sanskrit adnah “below,” Old English under “under, among;” see under). Opposed to super-. Its use as a prefix was rare in Latin.
pref.
- Inferior to, below, or beneath:infrasonic.