http://en.wikipedia.org/wiki/Piquant
www.dictionary.com
"tang 1 Audio Help (tāng) Pronunciation Key
n.

1. A distinctively sharp taste, flavor, or odor, as that of orange juice. See Synonyms at taste.
2. A distinctive quality that adds piquancy.
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http://en.wikipedia.org/wiki/Scoville_scale
"The Scoville scale is a measure of the hotness or, more correctly, piquancy of a chili pepper"

Adjective

piquant (comparative more piquant, superlative most piquant)

Positive
piquant

Comparative
more piquant

http://en.wiktionary.org/wiki/piquant
Superlative
most piquant

1. Engaging; charming.
2. Favorably stimulating to the palate; pleasantly spicy; stimulating.
3. (archaic) Causing hurt feelings; scathing.

pi·quant Audio Help (pē'kənt, -känt', pē-känt') Pronunciation Key
adj.

1. Pleasantly pungent or tart in taste; spicy.