From Longman Dictionary of Contemporary Englishvisual aidˌvisual ˈaid noun [countable] SEAVsomething such as a map, picture, or film that helps people understand, learn, or remember information
Examples from the Corpus
visual aid• As a visual aid to anatomical familiarity, a reference book such as this has undoubted value.• Any visual aid should be carefully selected and planned to add clarity to the presentation. 2.• By making the most of new visual aid technology. 