visual aid

noun

1. any of various materials depending on the sense of sight, as films, slides, photographs, etc., used as aids in teaching.

Word History and Origins

Origin of visual aid¹

First recorded in 1910–15

Example Sentences

Timothy B. Lee has a good visual aid at Vox showing exactly how this occurs.

From The Daily Beast

When the question needs to be raised, he may use the discussion method or perhaps some visual aid.

From Project Gutenberg