Definition of dihydroxyacetone in English:
 dihydroxyacetone
nounˌdʌɪhʌɪdrɒksɪˈasɪtəʊnˌdīhīˌdräksēˈasətōn
mass nounChemistry A synthetic compound with strong reducing properties, used in lotions for colouring the skin in sunlight.
Chemical formula: (CH₂OH)CO
 Example sentencesExamples
-  Researchers have found that dihydroxyacetone, a colorless sugar, interacts with dead cells located in the upper layer of the epidermis to produce a harmless color change that lasts about a week.
 -  Artificial tanning products use chemicals such as dihydroxyacetone that react with proteins in the skin to create a brown color.
 -  Recently it has been proposed to use dihydroxyacetone as a fluorescent marker for these events.
 -  Some beauty salons have recorded a 20% increase in sales of the treatment, which uses the colour additive dihydroxyacetone.
 -  All self-tanners contain a chemical called dihydroxyacetone, or DHA, which temporarily stains (within about an hour) the uppermost layer of your skin, called the stratum corneum.
 
Origin
  
Late 19th century: from dihydroxy- (in the sense 'containing two hydroxyl groups in the molecule') + acetone.