from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various natural or synthetic derivatives of vitamin A.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to the retina
  • n. Any of a class of compounds related to vitamin A

from the GNU version of the Collaborative International Dictionary of English

  • adj. Resinlike, or resinform; resembling a resin without being such.

from The Century Dictionary and Cyclopedia

  • Resin-like or resiniform; resembling a resin.


from The American Heritage® Dictionary of the English Language, 4th Edition

retin(ol) + -oid.


  • If a hormone-based acne treatment isn't an option, consider incorporating a cream called a retinoid (such as Retin-A, Differin or Tazorac) into your skin-care regimen.

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  • If you're using "photosensitizing topical or oral medications, such as antibiotics or retinoid products it is even more important to practice this basic step," she says.

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  • Otherwise, CR says, see a dermatologist for a prescription retinoid topical treatment.

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  • For those who visit a dermatologist and receive a retinoid prescription such as Tazorac, Dr. D.J. Verret told me, they will be disappointed to learn that insurance companies will not pick up the tab because the medication is indicated for acne in adolescents.

    Marcia G. Yerman: Retin A - What Can It Do for Your Skin?

  • The doctor should usually start with a topical antibiotic either alone or combined with a topical retinoid, which helps unclog pores.

    Red in the face? How to tell whether it's acne or rosacea

  • For example, after salicylic acid clears off dead skin from the epidermis, then another treatment such as a coal tar or a topical retinoid will be able to access treatable skin more easily.

    Psoriasis Guru » Blog Archive » Effective Psoriasis Treatments: Keratolytics

  • Try to pick one or two active ingredients—an antioxidant and a retinoid, for instance—and stick with them for at least three months a fair amount of time to see if you get results.

    Simple Skin Beauty

  • Besides prescribing a retinoid medication, a dermatologist can consider putting a patient on Accutane if a comedonal acne problem is extreme.

    Simple Skin Beauty

  • A prescription retinoid works beautifully to control both comedonal and inflammatory acne because it exfoliates the skin, regulates the shedding process of keratinocytes, and controls overproduction of sebum.

    Simple Skin Beauty

  • In order to have an effect on retinoid receptors, these must be converted to retinoic acid inside the body, and that conversion may not happen with the trace amount of low-strength vitamin A contained in a beauty product.

    Simple Skin Beauty


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