Let's Compare Retin-A and Retinol


Tretinoin is the acid form of vitamin A and is also known as all-trans retinoic acid or ATRA. It is a first generation topical retinoid commonly used to treat acne vulgaris and keratosis pilaris.

retina n : the light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve [also: {retinae} (pl)]

27 Moby Thesaurus words for "retina": baby blues, banjo eyes, bright eyes, clear eyes, cornea, eye, eyeball, eyelid, goggle eyes, iris, lens, lid, naked eye, nictitating membrane, oculus, optic, optic nerve, orb, organ of vision, peeper, popeyes, pupil, saucer eyes, sclera, starry orbs, unaided eye, visual organ

Retina \Ret"i*na\, n. [NL., from L. rete a net. Cf. {Reticule}.] (Anat.) The delicate membrane by which the back part of the globe of the eye is lined, and in which the fibers of the optic nerve terminate. See {Eye}. [1913 Webster] Note: The fibers of the optic nerve and the retinal blood vessels spread out upon the front surface of the retina, while the sensory layer (called Jacob's membrane), containing the rods and cones, is on the back side, next the choroid coat. [1913 Webster]


Retinol is one of the animal forms of vitamin A. It is a diterpenoid and an alcohol. It is convertible to other forms of vitamin A, and the retinyl ester derivative of the alcohol serves as the storage form of the vitamin in animals.

retinol n : an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene [syn: {vitamin A1}]

Retinol \Ret"i*nol\, n. [Gr. ??? resin + L. oleum oil.] 1. (Chem.) A hydrocarbon oil {C32H16}, obtained by the distillation of resin, -- used as a solvent, as an antiseptic, and in printer's ink. [1913 Webster +PJC] 2. One of the compounds which function as vitamin A. Called also {vitamin A}, {vitamin A1} and {vitamin A alcohol}. See {vitamin A1}. [PJC]

Data Sources:

  • retin-a: WordNet (r) 2.0
  • retin-a: Moby Thesaurus II by Grady Ward, 1.0
  • retin-a: The Collaborative International Dictionary of English v.0.44
  • retinol: WordNet (r) 2.0
  • retinol: The Collaborative International Dictionary of English v.0.44

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