11 letters · 15 points in Scrabble
noun materials using sight or sound to present information
adjective involving both hearing and seeing (usually relating to teaching aids)
originEtymology tree Proto-Indo-European *h₂ewisder. Proto-Indo-European *dʰeh₁-der. Proto-Italic *awizdjō Latin audi(ō) Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English audio- English visual English audiovisual From audio- + visual.
Etymology from Wiktionary, CC BY-SA 3.0