1. Resembling a resin; resinous. [G. retine, resin, + eidos, resemblance] 2. Resembling the retina. [Mediev. L. retina] 3. In plural form, term used to describe the natural forms and synthetic analogs of retinol.

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ret·i·noid 'ret-ən-.ȯid n any of various synthetic or naturally occurring analogs of vitamin A
retinoid adj

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any one of a group of drugs derived from vitamin A. They bind to one or more of six specific receptors that are found on many cells. On the skin they act to cause drying and peeling and a reduction in oil (sebum) production. These effects can be useful in the treatment of severe acne, psoriasis, ichthyosis, and other skin disorders. Retinoids include isotretinoin, tretinoin, acitretin, and tazarotene; they are administered by mouth or applied as a cream. Possible side-effects, which may be serious, include severe fetal abnormalities (if taken by pregnant women), toxic effects on babies (if taken by breastfeeding mothers), liver and kidney damage, excessive drying, redness and itching of the skin, and muscle pain and stiffness.

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ret·i·noid (retґĭ-noid) 1. resembling the retina. 2. retinol, retinal, or any structurally similar natural derivative or synthetic compound; the latter need any not have vitamin A activity.

Medical dictionary. 2011.


Look at other dictionaries:

  • Retinoid — Ret i*noid, a. [Gr. ??? resin + oid.] Resinlike, or resinform; resembling a resin without being such. [1913 Webster] …   The Collaborative International Dictionary of English

  • retinoid — [ret′ n oid΄] n. any of a large class of natural or synthetic, photosensitive chemical compounds that are similar to vitamin A, including retinoic acid and retinal …   English World dictionary

  • Retinoid — The retinoids are a class of chemical compounds that are related chemically to vitamin A. Retinoids are used in medicine, primarily due to the way they regulate epithelial cell growth. Retinoids have many important and diverse functions… …   Wikipedia

  • Retinoid — Retinoide sind chemische Substanzen, die in ihrer chemischen Struktur oder in ihrer biologischen Aktivität verwandt mit dem Retinol (Vitamin A) sind. [1] Inhaltsverzeichnis 1 Definitionsgeschichte 2 Therapeutisch eingesetzte Retinoide 2.1 Nicht… …   Deutsch Wikipedia

  • retinoid — noun Date: 1976 any of various synthetic or naturally occurring analogs of vitamin A …   New Collegiate Dictionary

  • retinoid — /ret n oyd /, n. 1. Biochem. any of a group of substances related to vitamin A and functioning like vitamin A in the body. adj. 2. resembling the retina. [1975 80; RETIN(OL) + OID] * * * …   Universalium

  • retinoid — 1. adjective Of or pertaining to the retina 2. noun Any of a class of compounds related to vitamin A …   Wiktionary

  • Retinoid — Re|ti|no|id [↑ Retin u. ↑ oid], das; s, e: Sammelbez. für physiol. aktive Derivate des Retinols (Vitamin A1), z. B. Retinale, Retinylester u. Retinoesäuren sowie deren synthetische Analoga u. Stereoisomere. Manchmal werden die R. zu den… …   Universal-Lexikon

  • Retinoid — Retino|i̱d [Kurzbildung aus ↑Retinol u. ↑] s; [e]s, e (meist Mehrz.): Bez. für Derivate von Vitamin A …   Das Wörterbuch medizinischer Fachausdrücke

  • retinoid — [ rɛtɪnɔɪd] noun Biochemistry any of a group of compounds having effects like those of vitamin A …   English new terms dictionary

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