1.
2.
[syn: sour, rancid]
The Collaborative International Dictionary of English v.0.48:
Rancid \Ran"cid\ (r[a^]n"s[i^]d), a. [L. rancidus, fr. rancere
to be rancid or rank.]
Having a rank smell or taste, from chemical change or
decomposition; musty; as, rancid oil or butter.
[1913 Webster]
WordNet (r) 3.0 (2006):
rancid
adj 1: (used of decomposing oils or fats) having a rank smell or
taste usually due to a chemical change or decomposition;
"rancid butter"; "rancid bacon"
2: smelling of fermentation or staleness [syn: sour, rancid]