The Collaborative International Dictionary of English v.0.48:
Inerrancy \In*er"ran*cy\ ([i^]n*[e^]r"ran*s[y^]), n. Exemption from error. [1913 Webster] The absolute inerrancy of the Bible. --The Century. [1913 Webster]WordNet (r) 3.0 (2006):
inerrancy n 1: (Christianity) exemption from error; "biblical inerrancy" [ant: errancy]