zinc oxide

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zinc

 [zingk]
a chemical element, atomic number 30, atomic weight 65.37, symbol Zn. (See Appendix 6.) It is a trace element in the diet, a component of several enzymes, including DNA and RNA polymerases and carbonic anhydrase. It is abundant in red meat, shellfish, liver, peas, lentils, beans, and rice. A well-balanced diet assures adequate intake of zinc. Those who may suffer from zinc deficiency include persons on a strictly vegetarian diet and those who are on a high-fiber diet. In the latter case, the zinc is bound to the fiber and is eliminated in the feces without having been absorbed through the intestinal wall. Poor absorption of zinc also can occur in persons with chronic and severe bowel disease. The recommended daily intake is 12–15 mg for an adult. A severe deficiency of zinc can retard growth in children, cause a low sperm count in adult males, and retard wound healing. Signs of a deficiency include anorexia and a diminished sense of taste. An excessive intake of zinc (usually in those who work with the metal or breathe its fumes) can either cause pneumoconiosis or interfere with the body's use of copper and other trace elements, producing diarrhea, nausea, vomiting, and other signs of intestinal irritation.
zinc acetate a salt used as an astringent and styptic.
zinc chloride a salt used as a nutritional supplement in total parenteral nutrition and applied topically as an astringent and a desensitizer for dentin.
zinc oxide a topical astringent and skin protectant; also a sunscreen.
zinc stearate a powder of zinc in a compound with stearic and palmitic acids; used as a water-repellent skin protectant in dermatoses.
zinc sulfate a topical astringent for mucous membranes, especially those of the eye.
zinc undecylenate the zinc salt of undecylenic acid; it is a topical antifungal.

zinc ox·ide

ZnO; used as a protective in ointment, as a dusting powder; also used in paint as a substitute for lead carbonate.

zinc oxide

n.
An amorphous white or yellowish powder, ZnO, used as a pigment, in compounding rubber, in the manufacture of plastics, and in pharmaceuticals and cosmetics.

zinc oxide

Toxicology A compound used in welding which, in excess, may cause zinc intoxication Uses Topically, astringent, calamine lotion. See Zinc.

zinc oxide

A white powder with mild ASTRINGENT properties used as a dusting powder or incorporated into creams or ointments and used as a bland skin application. Mixed with oil of cloves, zinc oxide forms an effective and pain-relieving temporary dressing for a tooth cavity. Zinc oxide is an ingredient in numerous proprietary medical preparations.

zinc ox·ide

(zingk ok'sīd)
Used as a protective in ointment and as a dusting powder; also used in paint as a substitute for lead carbonate.
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