Authenticity
Pronunciation : Au`then*tic"i*ty
Part of Speech : n.
Etymology : [Cf. F. authenticit?.]
Definition : 1. The quality of being authentic or of established authority for truth and correctness.
2. Genuineness; the quality of being genuine or not corrupted from the original.
Note: In later writers, especially those on the evidences of Christianity, authenticity is often restricted in its use to the first of the above meanings, and distinguished from qenuineness.
Source : Webster's Unabridged Dictionary, 1913