τετραμήνιος
From LSJ
τὸ ἓν καὶ τὸ ὂν πολλαχῶς λέγεται → the term being and the term one are used in many ways, one and being have various meanings, one and being have many senses
English (LSJ)
τετραμήνιον, lasting four months, γυμνασιαρχία POxy.1418.18 (iii A.D.).
Greek Monolingual
-ον, Α
αυτός που διαρκεί τέσσερεις μήνες.
[ΕΤΥΜΟΛ. < τετρ(α)- + -μήνιος (< μήν, μηνός), πρβλ. ἑπταμήνιος].