Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A white powder, C8H6O3, having a floral odor, used as flavoring and in perfume.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A white crystalline powder with a floral odour, used in perfume
  • n. The methylene ether of 3,4 dihydroxy benzaldehyde; having a melting point of 37°C and boiling point of 263°C

from the GNU version of the Collaborative International Dictionary of English

  • n. A white crystalline substance obtained by oxidation of piperic acid, and regarded as a complex aldehyde.

from The Century Dictionary and Cyclopedia

  • n. A white crystalline substance, C8H6O3, the methylene ether of protocatechuic aldehyde. It is made by oxidizing piperic acid with potassium permanganate, and in other ways. Known in perfumery as heliotropin, on account of its odor.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

piper(ine) + -on(e) + -al3.

Examples

  • And the vanilla in the mayonnaise - it contains the chemical piperonal, which, makes you expect, and, indeed, mentally create the taste of sweetness, even if it's not present.

    the ulterior epicure

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