The Collaborative International Dictionary of English v.0.48:

brasilein \bra*sil"e*in\, C16H12O5, to which brazilwood owes
   its dyeing properties.
   [Webster 1913 Suppl.] Brasque \Brasque\, n. [F.] (Metal.)
   A paste made by mixing powdered charcoal, coal, or coke with
   clay, molasses, tar, or other suitable substance. It is used
   for lining hearths, crucibles, etc. Called also steep.
   [Webster 1913 Suppl.]