Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of impingement is as below...

Impingement :: Impingement (n.) The act of impinging.

Phosphene :: Phosphene (n.) A luminous impression produced through excitation of the retina by some cause other than the impingement upon it of rays of light, as by pressure upon the eyeball when the lids are closed. Cf. After-image..

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