microcosmic salt

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English[edit]

Etymology[edit]

From its alchemical name sal microcosmicum.

Noun[edit]

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microcosmic salt (uncountable)

  1. (dated, chemistry) A white salt, extracted from urine; once used in the preparation of phosphorus, and used in analytical tests for some metals; ammonium sodium hydrogenphosphate (NH4)NaHPO4.
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