cerrus
From LSJ
ἐν δὲ μηνὸς πρῶτον τύχεν ἆμαρ → it chanced to be on the first of the month, that day fell on the first of the month
ἐν δὲ μηνὸς πρῶτον τύχεν ἆμαρ → it chanced to be on the first of the month, that day fell on the first of the month
cerrus: i, f.,
I a kind of oak, Turkey oak, Col. 7, 9, 6; Plin. 16, 5, 6, § 17; 16, 6, 8, § 19; Vitr. 2, 8; Pall. 1, 9, 3; id. Febr. 18, 3.
cerrus, ī, f., cerre, sorte de chêne : Vitr. Arch. 2, 9, 9 ; Plin. 16, 17.
