n. [ See Wourali. ] See Curare. [ 1913 Webster ]
n. [ So called because first observed in the Ural Mountains. ] (Min.) Amphibole resulting from the alternation of pyroxene by paramorphism. It is not uncommon in massive eruptive rocks. [ 1913 Webster ]
n. (Geol.) The change of pyroxene to amphibole by paramorphism. [ 1913 Webster ]