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me·so·pic | \ me-ˈzäp-ik 
, mē-ˈsōp- \
, mē-ˈsōp- \Medical Definition of mesopic
1 : having a face on which the root of the nose and central line of the face project moderately
2 : of or relating to vision under conditions of intermediate levels of illumination
mesopic vision tests made in a cloudy moonlight illumination — Science News Letter
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