GNU Collaborative International Dictionary of English

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1.       
   { Microcosmic , Microcosmical , } 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