noun \ə-ˈnäm-ə-lə-ˌskōp\

Definition of ANOMALOSCOPE

: an optical device designed to test color vision by matching a yellow light which may be varied in intensity with a combination of red and green lights of constant intensity

Seen & Heard

What made you want to look up anomaloscope? Please tell us where you read or heard it (including the quote, if possible).