Noun retinal purple has 1 sense
  1. visual purple, rhodopsin, retinal purple - a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
    --1 is a kind of photopigment
    --1 is a part of rod, rod cell, retinal rod
    --1 has substances: opsin; retinene, retinal
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