τετράμετρος

A. consisting of four metres, i.e., in iambic and trochaic verse, consisting of four double feet or syzygies: τὸ τετράμετρον is generally the trochaic tetrameter, Ar. Nu. 642,645, X. Smp. 6.3, Arist. Rh. 1404a31, 1409a1, Po. 1459b37: also the anapaestic tetrameter, called τὸ Ἀριστοφάνειον (as in Nu. 957 sq.), D.H. Comp. 25; cf. τρίμετρος.

2. γωνίαι τ. square, i.e. right, angles, Callix. 2 (dub. l.).