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a. a brownish colouring of the skin caused by the formation of the pigment melanin within the skin on exposure to the ultraviolet rays of the sun or a sunlamp
b. (as modifier): suntan oil



the darkening of human skin after exposure to ultraviolet radiation; such exposure causes an excess of the pigment melanin to be deposited in the surface layers.

A suntan develops gradually after repeated exposure to ultraviolet rays of low intensity. The deepest and longest-lasting tan results from prolonged exposure to sunlight; it often has an adverse effect on health (on the nervous, cardiovascular, and other systems). The extent and rapidity with which tanning takes place are not indicators of health.

Sensitivity to ultraviolet radiation varies from person to person, especially in children. Brunets with a swarthy skin tan more quickly than blonds or redheads with delicate, tender skin, which often burns on exposure to ultraviolet rays. Applying vegetable oils (nut, peach, and so forth) to skin speeds the tanning process and prevents the skin from drying out and, to some extent, from burning.

References in periodicals archive ?
My advice to you is to be very careful with the sun - it sounds like you spend long hours sun-bathing - this is not conducive to your skin with or without suntan lotions applied.
So it's certainly not time to throw out all your suntan lotion, and don't rely on the "sun protection pills" and supplements currently on the market, as (http://kstp.
Sales of suntan lotions, creams and oils in food, drug and mass merchandisers (excluding Walmart), topped $685 million for the year ended Dec.
Excessive suntan can cause "leathering" of the skin - which is a major turn off.
If she'd bought a better brand of suntan cream, she could be confident, happier, and darker.
Doing this religiously twice a day will help prolong a fast-fading suntan.
A suntan is not a sign of good health; a tan, even when there is no burning, always means that the skin has been damaged, a suntan is not nature's own sunscreen - it does not protect you from ultra-violet radiation.
Select-a-Vision is launching a line of Coppertone sunglasses through an exclusive agreement with Schering-Plough, the manufacturer of the sunscreen and suntan products.
The suntan was considered a mark of the lower class for hundreds of years but was resurrected in America as a fad in the 1920s and remains popular today.
Pack the pointe shoes and Pilates mat, but don't forget the suntan lotion.
Pupils will learn about safety precautions from applying suntan lotion to the safe use of inflatables.
InterContinental Hotel has arranged for a spectacular festive day for all guests, in sunny, refreshing, amusing ambience to start the summer season at InterContinental -- Aqaba , with a lovely suntan and light snack at the Front Beach restaurant , candle light dinner at Cote D'or, and cocktails at Martini's Bar and Lounge.