noun🔗ShareA 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."In a historical chemistry experiment, students prepared phosphorus from urine by first extracting the microcosmic salt, and then heating it to a high temperature. "chemistrycompoundsubstancesciencetechnicalChat with AIVocabulary GamePractice Reading