Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A white, crystalline oxidation product, C4H6N4O3, of uric acid that is the metabolic end product of purine oxidation in some mammals and is used in some dermatological preparations as an astringent. It is also found in allantoic fluid, amniotic fluid, and fetal urine.

from The Century Dictionary.

  • noun A crystalline substance (C4H6N4O3) found in the allantoic fluid of the cow; the nitrogenous constituent of the allantoic fluid. It is also obtained from other sources.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A crystalline, transparent, colorless substance found in the allantoic liquid of the fetal calf; -- formerly called allantoic acid and amniotic acid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry A diureide of glyoxylic acid, used in various pharmaceutical and cosmetic products; or a derivative of this compound

Etymologies

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

[allanto(is) + –in.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From allantois, an amniote embryonic excretory organ in which it concentrates during development in most mammals

Examples

  • Look for mascaras with hard-working ingredients like my Long Black Mascara which boasts candelilla wax, beeswax and allantoin to keep lashes in top-notch form.

    Napoleon Perdis: New Year, New You: 5 Easy Beauty Resolutions for 2011

  • Look for mascaras with hard-working ingredients like my Long Black Mascara which boasts candelilla wax, beeswax and allantoin to keep lashes in top-notch form.

    Napoleon Perdis: New Year, New You: 5 Easy Beauty Resolutions for 2011

  • Gravitate toward using anti-redness cleanser and a moisturizer that contains anti-inflammatory ingredients such as allantoin, aloe, or chamomile.

    Simple Skin Beauty

  • Gravitate toward using anti-redness cleanser and a moisturizer that contains anti-inflammatory ingredients such as allantoin, aloe, or chamomile.

    Simple Skin Beauty

  • Better to use a soothing, anti-inflammatory moisturizer containing aloe, allantoin, or chamomile.

    Simple Skin Beauty

  • You want to use soothing creams with emollients such as shea butter or olive oil and anti-inflammatory ingredients such as cucumber, aloe, and allantoin.

    Simple Skin Beauty

  • As with any sensitive skin program, look for products that contain anti-inflammatory ingredients such as allantoin and oatmeal that will help calm down both of your skin issues.

    Simple Skin Beauty

  • Start by using gentle products that contain anti-inflammatory ingredients such as aloe vera, allantoin, soy, vitamin E, and cucumber.

    Simple Skin Beauty

  • Better to use a soothing, anti-inflammatory moisturizer containing aloe, allantoin, or chamomile.

    Simple Skin Beauty

  • One thing you definitely do want added to your moisturizer is an anti-inflammatory ingredient such as soy, aloe vera, cucumber, calendula, oatmeal, or allantoin.

    Simple Skin Beauty

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