retinal meaning

  • Retinal, also called retinaldehyde or vitamin A aldehyde, is one of the many forms of vitamin A (the number of which varies from species to species).
  • Vertebrate animals ingest retinal directly from meat, or produce retinal from one of two carotenes (α-carotene, β-carotene), and also from another type of carotenoid known as β-cryptoxanthin, a type of xanthophyll,
  • Invertebrates such as insects and squid use hydroxylated forms of retinal in their visual systems, which derive from conversion from other xanthophylls.

    Definition of retinal in English Dictionary

  • NounPLretinalsPREré-SUF-inal
    1. (biochemistry) One of several yellow or red carotenoid pigments formed from rhodopsin by the action of light; retinene.
    2. Adjective
      1. (ophthalmology) Of or pertaining to the retina.
      2. More Examples
        1. Used in the Middle of Sentence
          • Choroidal thickness was defined as the distance between the retinal pigment epithelium (outermost hyperreflective line) to the inner margin of the sclera.
          • We demonstrated that microdensitometric method measures the column of blood in the retinal arterioles.
          • DME was defined as the presence of any retinal thickening or hard exsudates at the posterior pole irrespective of center involvement or ischemic characteristics.
      • Part-of-Speech Hierarchy
        1. Adjectives
          • Nouns
            • Countable nouns
          Related Links:
          1. en retinals
          2. en retinalite
          3. en retinalites
          4. en retinaldehyde
          Source: Wiktionary

          Meaning of retinal for the defined word.

          Grammatically, this word "retinal" is an adjective. It's also a noun, more specifically, a countable noun.
          Definiteness: Level 1
          Definite    ➨     Versatile