trona

POS

Noun

HYPHEN

tro=na

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CIDE DICTIONARY

trona, n. [Of Egyptian or North African origin.].

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]

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