phospholipid


phos·pho·lip·id

noun \-ˈli-pəd\

Definition of PHOSPHOLIPID

:  any of numerous lipids (as lecithins and phosphatidylethanolamines) in which phosphoric acid as well as a fatty acid is esterified to glycerol and which are found in all living cells and in the bilayers of cell membranes

First Known Use of PHOSPHOLIPID

1928

phos·pho·lip·id

noun \-ˈlip-əd\   (Medical Dictionary)

Medical Definition of PHOSPHOLIPID

: any of numerous lipids (as lecithins and phosphatidylethanolamines) in which phosphoric acid as well as a fatty acid is esterified to glycerol and which are found in all living cells and in the bilayers of cell membranes—called also phosphatide, phospholipin

Variants of PHOSPHOLIPID

phos·pho·lip·id also phos·pho·lip·ide \-ˌīd\

phospholipid

noun    (Concise Encyclopedia)

Any member of a large class of fatlike organic compounds that in their molecular structure resemble the triglycerides, except for the replacement of a fatty acid with a phosphate-containing polar group. The polar end of the molecule is soluble in water (hydrophilic) and water solutions (including cytoplasm); the other, fatty-acid end is soluble in fats (hydrophobic). In a watery environment phospholipids naturally combine to form a two-layer structure (lipid bilayer) with the fat-soluble ends sandwiched in the middle and the water-soluble ends sticking out. Such lipid bilayers are the structural basis of cell membranes. Phospholipids are the principal components of the myelin sheaths of neurons. Examples of phospholipids include lecithin, cephalins, phosphoinositides (in the brain), and cardiolipin (in the heart). See also detergent.

Variants of PHOSPHOLIPID

phospholipid or phosphatide

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