Bleaching

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Dentistry The process of removing stains from the teeth; whitening is the generally preferred term
Dermatology The process of removing color or pigment from the skin using various potentially harmful chemicals
Environment A mass extinction of coral in certain regions which is variously attributed to global warming or to local stressors
Vox populi The removing of stains or colours, in particular, the process of whitening fabrics by chemicals—e.g., bleach, or bleaching powder consisting of chloride of lime

Bleaching

Technique used to brighten stained teeth.
Mentioned in: Cosmetic Dentistry

Bleaching 

1. The process of changing colour from the pink of a dark-adapted retina to a pale yellow colour after it has been exposed to light. This is due to the reaction of the rhodopsin pigment. The process is reversible if the healthy retina is allowed to remain in the dark.
2. Process to remove a tint from organic lenses. See visual pigment.

bleach, bleach·ing

(blēch, blēching)
Removal of color from an object using chemicals or light.
References in periodicals archive ?
The presence of a series of crofting images in the slide sequence casts a conflicting light on romanticism, for the crofters' residual beliefs and practices straddled the divide between what was perceived as belonging to the past and to the present.
"Access to a Scotlandwide market for wild goose meat is one way of helping secure a future sustainable balance between active crofting and the greylag goose population."
After debate in the Scottish Parliament in November 1999, detailed changes were made (resulting from the consultation involved in all stages of the debate) to facilitate effective land management, political discretion in the matter of community legitimacy, and detailed provisions to allow for crofting community ownership.
Under crofting law, it is common grazing for nearby crofts.
John Morrison was born in 1920 on the Isle of Lewis to a crofting family and left the local school, aged 12, with no qualifications.
William Fraser, of the Crofting Foundation, added: "Crofters witnessed lambs being lifted up and dropped by the sea eagle and we had a post-mortem done on one lamb which confirmed talon marks on the carcass."
A spokesman for the Scottish Crofting Foundation said Mr Al Fayed's outburst was "unhelpful".
"This case is quite interesting because there is no crofting community living on the estate and I don't think the immediately neighbouring estates are likely to be interested."
Since the Land Reform (Scotland) Act 2003, crofting communities have had the right to buy their local land, subject to ministerial approval, whether or not the landowners wanted to sell.
Highland GP and former chairman of the Scottish Committee of the Royal College of General Practitioners, Miles Mack, said: "It looked at the state of medical services in the Highlands and Islands, which was basically crofting communities.