Entry 2 senses · 2 variants Webster, 1913 Putrescible · Pu·tres·ci·ble · IPA /pjuːˈtɹɛsɪb(ə)l/ a. n. 01 a. Capable of putrefaction; liable to become putrid; as, putrescible substances. 1. Capable of putrefaction; liable to become putrid; as, putrescible substances. 02 n. A substance, usually nitrogenous, which is liable to undergo decomposition when in contact with air and moisture at ordinary temperatures. 1. A substance, usually nitrogenous, which is liable to undergo decomposition when in contact with air and moisture at ordinary temperatures.