aphronitrum

διὰ νήσων τὸν πλόον ἐποιεῦντο → they kept sailing through the islands

Latin > English (Lewis & Short)

ā̆phrŏnī̆trum: i, n., = ἀφρόνιτρον,
I the efflorescence of saltpetre, Plin. 31, 10, 46, § 3; Mart. 14, 58.