Retinal Definition
 rĕtn-ăl 
    adjective
  
 Of or related to a retina.
 Webster's New World 
    noun
  
 A yellowish carotenoid, C20H28O, liberated when rhodopsin or iodopsin is transformed by the action of light.
 Webster's New World 
A similar carotenoid, C20H26O, formed by the action of light on porphyropsin.
 Webster's New World 
Synonyms: 
  Other Word Forms of Retinal
Noun
Singular:
 retinalPlural:
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