Urao

2 definitions found

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

  Trona \Tro"na\, n. [Of Egyptian or North African origin.] (Chem.
     & Min.)
     A native double salt, consisting of a combination of neutral
     and acid sodium carbonate, {Na2CO3.2HNaCO3.2H2O}, occurring
     as a white crystalline fibrous deposit from certain soda
     brine springs and lakes; -- called also {urao}, and by the


     ancients {nitrum}.
     [1913 Webster]

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

  Urao \U*ra"o\, n. [Sp.] (Min.)
     See {Trona}.
     [1913 Webster] Urare