a sharp distinctive flavour
a pungent or distinctive smell
something stimulating to the senses
treated murder as a joke with a tang to it — Graham Greene
a faint suggestion; a trace
a projecting shank or tongue, e.g. on a knife, file, or sword, that connects with and is enclosed by a handle
tanged adj
[Middle English, in the sense ‘insect's sting’, also ‘snake's tongue’ (believed to sting), from Old Norse tangi point, tang of a knife]