: the act or process of darkening your skin by exposing it to the bright light of the sun or a special type of lamp

Full Definition of TANNING

:  the art or process by which a skin is tanned
:  a browning of the skin especially by exposure to sun
:  a sound spanking
:  a natural darkening and hardening of the cuticle of an insect immediately after molting

First Known Use of TANNING

15th century


noun \ˈtan-iŋ\   (Medical Dictionary)

Medical Definition of TANNING

: a browning of the skin by exposure to sun


noun    (Concise Encyclopedia)

Chemical treatment of raw animal hides or skins to convert them into leather. Vegetable tanning (using bark, wood, roots, or berries) has been practiced since prehistoric times. After removal of hair, flesh, or fat, a tanning agent displaces water from the interstices between the protein (mostly collagen) fibres in the skin and cements the fibres together. The agents most widely used are vegetable tannin, salts such as chromium sulfate, and fish or animal oil. The tanning of fair skin in humans by sunlight is completely different: ultraviolet light causes production and redistribution of the pigment melanin in epidermal cells.


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