The Collaborative International Dictionary of English v.0.48:
Limekiln \Lime"kiln`\ (l[imac]m"k[i^]ln`), n. A kiln or furnace in which limestone or shells are burned and reduced to lime. [1913 Webster] lime lightWordNet (r) 3.0 (2006):
limekiln n 1: a kiln used to reduce naturally occurring forms of calcium carbonate to lime