AskDefine | Define glyceride

Dictionary Definition

glyceride n : an ester of glycerol and fatty acids that occurs naturally as fats and fatty oils; "fresh fats contain glycerides of fatty acids and very little free acid" [syn: acylglycerol]

User Contributed Dictionary

English

Noun

  1. An ester of glycerol and one or more fatty acid; they are the major constituents of lipids.

Translations

an ester of glycerol and one or more fatty acids
  • French: acylglycérol, glycéride

Extensive Definition

Glycerides, more correctly known as acylglycerols, are esters formed from glycerol and fatty acids.
Glycerol has three hydroxyl functional groups, which can be esterified with one, two, or three fatty acids to form monoglycerides, diglycerides, and triglycerides.
Vegetable oils and animal fats contain mostly triglycerides, but are broken down by natural enzymes (lipases) into mono- and diglycerides and free fatty acids.
Soaps are formed from the reaction of glycerides with sodium hydroxide. Glycerol is a product that can soften dehydrated skin by absorbing moisture from the air. If pure glycerol were left exposed to normal air, in 10 to 12 hours it would become 80% glycerol and 20% water by absorbing 1/5 of its weight in water.
Partial glycerides are esters of glycerol with fatty acids, whereby only a part of the existing hydroxyl groups are esterified. Some hydroxyl groups within the glycerol ester are free contributing to the polaric properties of the material. Short chain partial glycerides are more polaric and have excellent solvent properties for many hard-to-solubilize drugs.

References

glyceride in Danish: Glycerid
glyceride in German: Acylglycerine
glyceride in Spanish: Acilglicérido
glyceride in Esperanto: Glicerido
glyceride in French: Acylglycérol
glyceride in Galician: Acilglicérido
glyceride in Korean: 글리세라이드
glyceride in Italian: Gliceridi
glyceride in Hebrew: גליצריד
glyceride in Dutch: Glyceride
glyceride in Polish: Acyloglicerole
glyceride in Vietnamese: Glyxerit
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