Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
Either of two carotenoid pigments found in the retina and produced from vitamin A; retinal
retinaldehyde
Definition source: English Wiktionary via Wiktextract
Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Either of two carotenoid pigments found in the retina and produced from vitamin A; retinal
dehydroretinaldehyde
Definition source: English Wiktionary via Wiktextract
Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
either of two yellow to red retinal pigments formed from rhodopsin by the action of light
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: retinal
Antonyms: none provided
Broader terms: pigment
History
From retina + -ene.
