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iodine
iodise
iodism
iodize
iodo-
iodoform
iodometry
iodophor
iodopsin
iolite
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ion engine
ion exchange
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iodopsin
i·o·dop·sin [  ə dópsin ]


noun 
Definition:
 
pigment in eye: a photosensitive violet pigment in the retinal cones of the eye
[Mid-20th century. < Greek iōdēs (see iodine) + opsin, after rhodopsin]
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