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The Collaborative International Dictionary of English v.0.48 (gcide)

Microcosmic \Mi`cro*cos"mic\, Microcosmical \Mi`cro*cos"mic*al\,
a. [Cf. F. microcosmique.]
Of or pertaining to the microcosm.
[1913 Webster]

{Microcosmic salt} (Chem.), a white crystalline substance
obtained by mixing solutions of sodium phosphate and
ammonium phosphate, and also called
{hydric-sodic-ammonic-phosphate}. It is a powerful flux,
and is used as a substitute for borax as a blowpipe
reagent in testing for the metallic oxides. Originally
obtained by the alchemists from human urine, and called
{sal microcosmicum}.
[1913 Webster]