pro·pi·on·ic acid 
(prō′pē-ŏnĭk)
(prō′pē-ŏnĭk)n.
An oily liquid acid, C3H6O2, found naturally in sweat, in milk products, and as a product of bacterial fermentation. Prepared synthetically from ethyl alcohol and carbon monoxide, it is used chiefly in the form of its propionates as a mold inhibitor in bread and as an ingredient in perfume. Also called propanoic acid.
[Greek pro-, first; see PRO-2 + Greek pīōn, fat (from the fact that it is first in order among the fatty acids); see peiə- in the Appendix of Indo-European roots + -IC.]
- Indo-European root: kat-
- Indo-European root: kau-
- Indo-European root: kaə-id-
- Indo-European root: ked-
- Indo-European root: keg-
- Indo-European root: kei-
- Indo-European root: keiə-
- Indo-European root: kekw-
- Indo-European root: kel-
- Indo-European root: kel-
- Indo-European root: kelə-
- Indo-European root: kelə-
- Indo-European root: ken-
- Indo-European root: kenk-
- Indo-European root: kens-
- Indo-European root: kent-
- Indo-European root: ker-
- Indo-European root: ker-
- Indo-European root: ker-
- Indo-European root: kerd-
- Indo-European root: kerp-
- Indo-European root: kers-
- Indo-European root: kerə-
- Indo-European root: kes-
- Indo-European root: keuə-