skiascope


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ski·a·scope

 (skī′ə-skōp′)
[Greek skiā, shadow + -scope.]

skiascope

(ˈskaɪəˌskəʊp)
n
(Medicine) med a medical instrument for examining the eye to detect errors of refraction. Also called: retinoscope See also retinoscopy
[C19: from Greek skia a shadow + -scope]