Nitroglycerin; an oily, volatile chemical compound used as an explosive and also as a medication for heart conditions.
A variant spelling of 'glonoin,' derived from 'glycerin' and chemical nomenclature from 19th-century pharmaceutical terminology, particularly in homeopathic medicine.
Medieval alchemists would have been astounded that the same substance—sensitive to heat and friction, prone to exploding unexpectedly—would one day save millions of lives by dilating blood vessels in the heart.
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