'Errancy' definitions:

Definition of 'errancy'

From: WordNet
noun
(Christianity) holding views that disagree with accepted doctrine; especially disagreement with papal infallibility; "he denies the errancy of the Catholic Church"
noun
Fallibility as indicated by erring or a tendency to err [ant: inerrancy]

Definition of 'Errancy'

From: GCIDE
  • Errancy \Er"ran*cy\, n. [L. errantia.] A wandering; state of being in error. [1913 Webster]