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euthoscopic

adjective eu·tho·scop·ic \ ¦yüthə¦skäpik \
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Definition of euthoscopic

of a photoreceptor
: capable of perceiving the presence, direction, and relative intensity of light but unable to form a visual image

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Origin and Etymology of euthoscopic

eutho- (irregular from Greek euthys straight) + -scopic

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