Found 1 items, similar to nitrum.
English → English (gcide) Definition: nitrum 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]