aphronitrum
From LSJ
ὁ κόσμος ἀλλοίωσις, ὁ βίος ὑπόληψις → the universe is flux, life is opinion | the universe is transformation: life is opinion | the universe is change, life is a fleeting impression | the universe—mutation: life—opinion
Latin > English (Lewis & Short)
ā̆phrŏnī̆trum: i, n., = ἀφρόνιτρον,
I the efflorescence of saltpetre, Plin. 31, 10, 46, § 3; Mart. 14, 58.
Latin > French (Gaffiot 2016)
aphrŏnitrum, ī, n. (ἀφρόνιτρον), écume ou fleur de nitre : Plin. 31, 113.