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phosphene

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈfɒsfiːn/US:USA pronunciation: respellingUSA pronunciation: respelling(fos′fēn)

phos•phene (fos′fēn),USA pronunciation n. [Physiol.]

Physiology, Pathologya luminous image produced by mechanical stimulation of the retina, as by pressure applied to the eyeball by the finger when the lid is closed.

Greek phôs light (contraction of pháos) + phaínein to show, shine
French phosphène, irregularly
1870–75

Collins Concise English Dictionary © HarperCollins Publishers::

phosphene /ˈfɒsfiːn/ n

the sensation of light caused by pressure on the eyelid of a closed eye or by other mechanical or electrical interference with the visual system

Etymology: 19th Century: from Greek phōs light + phainein to show

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⇱ phosphene - WordReference.com Dictionary of English

phosphene