Source: The Collaborative International Dictionary of English v.0.48
Lecithin \Lec"i*thin\, n. [Gr. le`kiqos the yolk of an egg.]
(Physiol. Chem.)
A complex, nitrogenous phosphorized substance widely
distributed through the animal body, and especially
conspicuous in the brain and nerve tissue, in yolk of eggs,
and in the white blood corpuscles.
[1913 Webster]
lecithin
n : a yellow phospholipid essential for the metabolism of fats;
found in egg yolk and in many plant and animal cells;
used commercially as an emulsifier
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