oast

from WordNet (r) 3.0 (2006)

oast
    n 1: a kiln for drying hops

from The Collaborative International Dictionary of English v.0.48

Oast \Oast\ ([=o]st), n. [OE. ost, AS. [=a]st; cf. Gr. a'i^qos
   burning heat.]
   A kiln to dry hops or malt; a cockle. --Mortimer.
   [1913 Webster]