From Webster's Revised Unabridged Dictionary (1913) :
Disclaimer \Dis*claim"er\, n.
1. One who disclaims, disowns, or renounces.
2. (Law) A denial, disavowal, or renunciation, as of a title,
claim, interest, estate, or trust; relinquishment or
waiver of an interest or estate. --Burrill.
3. A public disavowal, as of pretensions, claims, opinions,
and the like. --Burke.