'Phosphene' definitions:

Definition of 'Phosphene'

From: GCIDE

Phosphene \Phos"phene\ (f[o^]s"f[=e]n), n. [Gr. fw^s light + fai`nein to show.] (Physiol.) 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. [1913 Webster]