bitter principle

bitter principle

noun Chemistry.
any of several hundred natural compounds, usually of vegetable origin, having a bitter taste, and not admitting of any chemical classification.

Origin:
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bitter principle is always a great word to know.
So is revive. Does it mean:
to restore or reduce to the natural or uncombined state, such as a metal
a compound of high molecular weight made by adding many smaller molecules or by condensation smaller molecules with the elimination of water or alcohol
Collins
World English Dictionary
bitter principle
 
n
any of various bitter-tasting substances, such as aloin, usually extracted from plants

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