bitter

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A preparation, usually of herbal origin, with a bitter taste, which allegedly triggers a cascade of sensory CNS responses—e.g., stimulation of appetite, increased flow of gastric and bile juices, hepatic detoxification, and effecting intrinsic repair of the gastrointestinal tract

bitter

(bĭt′ĕr) [AS. biter, strong]
Having a caustic, sharp, or disagreeable taste. It is one of the five taste senses (bitter, salty, savory, sour, and sweet).

bitter

1. an austere and unpalatable taste like that of quinine.
2. a medicinal and culinary agent used as a tonic, alterative or appetizer.

bitter almond
a variety of Prunus amygdalus, the almond tree. Grown for the production of almond oil. The kernel of its seed contains sufficient cyanogenetic glycoside to be a possible cause of cyanide poisoning. The smell of bitter almonds is often quoted as being a characteristic finding in cases of cyanide poisoning in animals.
bitter bark
see alstoniaconstricta.
bitter melon
citrulluslanatus.
bitter rubberweed
hymenoxysodorata.
bitter sneezeweed
heleniumamarum.
bitter vetch
ervumervilia.