optomotor reaction

noun

op·​to·​mo·​tor reaction

¦äptə¦mōtə(r)-

: a reflex involving turning of head or body in response to moving stripes of differing luminosity

Word History

Etymology

opto- + -motor (as in locomotor, vasomotor)

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!