propionic acid pro·pio·ni·cacid uncommon noun 1. a liquid fatty acid found in milk and sweat and in fuel distillates Synonymspropionic acidpropanoic acid Related words Broader terms carboxylic acid Parts fenoprofenflurbiprofenibuprofenketoprofennaproxennaproxen sodiumoxaprozin WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
