Realgar

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Realgar \Re*al"gar\ (r[-e]*[a^]l"g[~e]r), n. [F. r['e]algar, Sp.
     rejalgar, Ar. rahj al gh[=a]r powder of the mine.] (Min.)
     Arsenic sulphide, a mineral of a brilliant red color; red
     orpiment. It is also an artificial product.
     [1913 Webster] re-align



From WordNet (r) 2.0 [wn]:

  realgar
       n : a rare soft orange mineral consisting of arsenic sulphide;
           an important ore of arsenic