LECITHIN
\lˈɛsɪθˌɪn], \lˈɛsɪθˌɪn], \l_ˈɛ_s_ɪ_θ_ˌɪ_n]\
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Derivatives of phosphatidic acids in which the phosphoric acid is bound in ester linkage to a choline moiety. Complete hydrolysis yields 1 mole of glycerol, phosphoric acid and choline and 2 moles of fatty acids.
By DataStellar Co., Ltd
By William R. Warner
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A phosphorized fat of cell-protoplasm.
By Henderson, I. F.; Henderson, W. D.
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Fatty principle, C44H90NPO9, found in animal tissues; also, any principle of the group to which normal lecithin belongs.
By Willam Alexander Newman Dorland
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A term for a class of bodies derived from the tissues of the brain and nerves, from amniotic fluid, from yolk of egg, from bile, from spermatozooids, and from certain vegetable substances. All are derivatives of glycerin, formed by the substitution of the molecules of 2 fatty acid radicles for 2 molecules of hydroxyl, while the third molecule of hydroxyl is replaced by a molecule of neurin in combination with phosphoric acid. Upon boiling in alkalis or baryta water the l's are hydrolyzed to fatty acids, glycerin, phosphoric acid, and cholin. Intermediate products, such as glycerin and phosphoric acid, have also been isolated. [Gr.]
By Smith Ely Jelliffe
Word of the day
Olivopontocerebellar Atrophies
- group inherited disorders which share progressive ataxia combination with atrophy CEREBELLUM; PONS; inferior olivary nuclei. Additional features include RIGIDITY; NYSTAGMUS; RETINAL DEGENERATION; MUSCLE SPASTICITY; DEMENTIA; URINARY INCONTINENCE; OPHTHALMOPLEGIA. familial has an earlier onset (second decade) and may feature spinal cord atrophy. sporadic form tends to present in the fifth or sixth decade, is considered a clinical subtype MULTIPLE SYSTEM ATROPHY. (From Adams et al., Principles of Neurology, 6th ed, p1085)