the quality of being agreeably stimulating or mentally exciting
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Piquancy \Pi"quan*cy\, n. [See {Piquant}.] The quality or state of being piquant.
But the faded socks, while losing none of their piquancy, did look a good deal better. The incident reminded me of a tip I read in Lady Diana Cooper's memoirs, The Rainbow Comes and Goes.
However it all turns out, there is a piquancy in the means of investigation.