[1895–1900]This word is first recorded in the period 1895–1900. Other words that entered Englishat around the same time include: backstage, calling card, cutback, frame of reference, freewheel
Examples of 'visual purple' in a sentence
visual purple
Betacarotene is also needed to make 'visual purple', the substance that helps us to see in the dark and protects against cataracts.