σφηνοκέφαλος
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
English (LSJ)
ον,
A with wedgeshaped or peaked head, Str.2.1.9.
Greek (Liddell-Scott)
σφηνοκέφᾰλος: -ον, ὁ ἔχων κεφαλὴν σφηνοειδῆ ἢ εἰς ὀξὺ ἀπολήγουσαν, Πᾶνας σφηνοκεφάλους Στράβ. 70.