Wordnet 3.0
NOUN (1)
1.
the property of being rancid;
The Collaborative International Dictionary of English v.0.48:
Rancidness \Ran"cid*ness\, n.
The quality of being rancid.
[1913 Webster]
WordNet (r) 3.0 (2006):
rancidness
n 1: the property of being rancid