HEPHTHEMIMERIS (composed of hepta, seven, hemer, half, and meris, part), in the Greek and Latin poetry, a sort of verse consisting of three feet and a syllable; that is, of seven half feet.
Such are most of the verses in Anacreon:
And that of Arilophanes, in his Plutus:
Ἐπειδὴ μὲν γὰρ ἔστι.
They are also called trimetri catalektici.