Search Result for "firebrick": 
Wordnet 3.0

NOUN (1)

1. brick made of fire clay; used for lining e.g. furnaces and chimneys; 



The Collaborative International Dictionary of English v.0.48:

firebrick \firebrick\ n.
   a brick made of fire clay, used for lining e.g. furnaces and
   chimneys.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

firebrick
    n 1: brick made of fire clay; used for lining e.g. furnaces and
         chimneys