tiglic acid

tig·lic acid

noun \ˌtig-lik-\

Definition of TIGLIC ACID

: a vesicant crystalline unsaturated acid C₅H₈O₂ with a spicy odor that is the stable stereoisomer of angelic acid and occurs in the form of esters especially in chamomile oil from a European chamomile (Chamaemelum nobile) and in croton oil