e/Aphronitre

Information
has gloss	eng: Aphronitre, or aphronitrum, is a kind of nitre, mentioned in ancient texts. It was supposed to be the foam or froth of a liquid, emerging to the top. Naturalists have taken the ancient aphronitre to have been a native saltpeter.
lexicalization	eng: Aphronitre
instance of	(noun) any compound containing the nitrate group (such as a salt or ester of nitric acid) nitrate