grayout

noun
gray·​out
variants: or chiefly British greyout \ˈgrā-​ˌau̇t \

Medical Definition of grayout 

(Entry 1 of 2)

: a transient dimming or haziness of vision resulting from temporary impairment of cerebral circulation — compare blackout, redout

\ˌgrā-ˈau̇t \

Medical Definition of gray out (Entry 2 of 2)

: to experience a grayout — compare black out, red out

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