Definitions

1. adjective

relating to or derived from propionic acid or propanoic acid

“The propionic acid is a byproduct of bacterial fermentation.”

2. noun

a salt or ester of propionic acid

“Propionic esters are commonly used as flavorings in food products.”

3. noun

an acid or compound containing the propionic group

“The molecule consists of a propionic group bonded to a nitrogen atom.”