a combining form used in the formation of compound words, with the meanings: “sound within the range of human hearing” (audiometer); “hearing” (audiology); “sound reproduction” (audiophile).
indicating hearing or sound: audiometer, audiovisual
Word Origin
from Latin audīre to hear
Word Origin and History for audio-
word-forming element meaning "sound, hearing," from comb. form of Latin audire "hear," (see audience); first used in English as a word-formation element 1913.