The Collaborative International Dictionary of English v.0.48:
Warming \Warm"ing\, a. & n. from Warm, v. [1913 Webster] Warming pan, a long-handled covered pan into which live coals are put, -- used for warming beds. --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
warming pan n 1: a long-handled covered pan holding live coals to warm a bed