Definition of peonin in US English:

peonin

noun

Chemistry
  • An anthocyanin (usually isolated as the reddish violet chloride, C₂₈H₃₃O₁₆Cl) that is the colouring matter of red peonies and on hydrolysis gives peonidin and glucose.

Origin

Late 19th century; earliest use found in Harper's Magazine. From peony + -in.

Pronunciation

peonin

/ˈpiːənɪn/