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sunburn

(Encyclopedia) sunburn, inflammation of the skin caused by actinic rays from the sun or artificial sources. Moderate exposure to ultraviolet radiation is followed by a red blush, but severe exposure?

sunscreen

(Encyclopedia) sunscreen: see sunburn.

melanin

(Encyclopedia) melanin m?l?n?n, water-insoluble polymer of various compounds derived from the amino acid tyrosine. It is one of two pigments found in human skin and hair and adds brown to skin color?

zinc oxide

(Encyclopedia) zinc oxide, chemical compound, ZnO, that is nearly insoluble in water but soluble in acids or alkalies. It occurs as white hexagonal crystals or a white powder commonly known as zinc?

vitiligo

(Encyclopedia) vitiligo, condition that causes irregular patches of skin to lose pigment and turn white. The exact cause is unknown, but it occurs when the immune system attacks and destroys?

ultraviolet radiation

(Encyclopedia) ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanometers and in frequency from about?

skin cancer

(Encyclopedia) skin cancer, malignant tumor of the skin. The most common types of skin cancer are basal cell carcinoma, squamous cell carcinoma, and melanoma. Rarer forms include mycosis fungoides (a?

Effects of Sun

Sunburn. Overexposure to the sun can happen in just a few hours. A bad reaction includes tenderness, pain, swelling, and blistering, and may include fever, chills, and nausea. While there?

Carl Sandburg: Autumn Movement

Autumn MovementCarl SandburgI cried over beautiful things knowing no beautiful thing lasts.The field of cornflower yellow is a scarf at the neck of the copper sunburned woman, the mother of?

A Boy's Will: The Vantage Point

by Robert Frost In NeglectMowingThe Vantage Point And again scornful, but there is no one hurt. IF tired of trees I seek again mankind, Well I know where to hie me?in the dawn, To a?