Etymology
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audiovisual (adj.)

also audio-visual, 1937, from audio- + visual.

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Definitions of audiovisual
1
audiovisual (n.)
materials using sight or sound to present information;
language tapes and videocassettes and other audiovisuals
Synonyms: audiovisual aid
2
audiovisual (adj.)
involving both hearing and seeing (usually relating to teaching aids);
the school's audiovisual department
From wordnet.princeton.edu