/ tæŋ; NAmE / noun
[ usually sing. ] a strong sharp taste or smell :
the tang of lemons
► tangy / ˈtæŋi; NAmE / adjective :
a refreshing tangy lemon flavour
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WORD ORIGIN
Middle English (denoting a snake's tongue, formerly believed to be a stinging organ; also denoting the sting of an insect): from Old Norse tangi point, tang of a knife.