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a white powder, C 4 H 6 N 4 O 3 , produced by oxidation of uric acid and the major excretory product of purine degradation in many vertebrates: used medicinally to heal skin ulcers and in lotions, lipsticks, etc., for its soothing effect.
a substance derived from the secretions of snails and contained in some plants, used in skin care products and valued for its soothing properties

allantoin al·lan·to·in (ə-lān’tō-ĭn)

A substance present in allantoic fluid, amniotic fluid, and fetal urine.

A crystalline oxidation product of uric acid produced in vertebrate purine metabolism and used medicinally to promote tissue growth.


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    allantoinuria allantoinuria al·lan·to·i·nu·ri·a (ə-lān’tō-ə-nur’ē-ə, -nyur’-) n. The excretion of allantoin in the urine.

  • Allargando

    becoming slower and broader. adjective, adverb (music) (to be performed) with increasing slowness

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    noting a case, as in Finnish, whose distinctive function is to indicate place to or toward which. the allative case. n. grammatical case expressing “motion towards,” 1860, from Latin allatus “brought to,” used as past participle of adferre, affere “to bring to,” from ad- “to” (see ad-) + latus “borne, carried” (see oblate (n.)).

  • Allayed

    to put (fear, doubt, suspicion, anger, etc.) to rest; calm; quiet. to lessen or relieve; mitigate; alleviate: to allay pain. Contemporary Examples The only joy is the momentary spasm of sexual gratification; the only happiness that of (temporarily) allayed jealousy. David’s Bookclub: Sodom and Gomorrah David Frum September 28, 2012 Historical Examples The parched mouth […]

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