DEFINITION
noun
1 a sweet crystalline substance obtained from various plants, esp. sugar cane and sugar beet, consisting essentially of sucrose, and used as a sweetener in food and drink.• a lump or teaspoonful of this, used to sweeten tea or coffee: I'll have mine black with two sugars.• informal used as a term of endearment or an affectionate form of address: what's wrong, sugar?• [ as exclamation ] informal used as a euphemism for “shit.”• informal a psychoactive drug in the form of white powder, esp. heroin or cocaine.2 Biochemistry any of the class of soluble, crystalline, typically sweet-tasting carbohydrates found in living tissues and exemplified by glucose and sucrose.
ORIGIN
Middle English: from Old French sukere, from Italian zucchero, probably viamedieval Latin from Arabic sukkar .
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