[1097] τετρα-γωνισμός, ὁ, das Viereckigmachen, die Quadratur, ὁ ἐπὶ τῶν τμημάτων, Arist. Phys. 1, 2.
Herder-1854: Tetra
Meyers-1905: Tetra
Pierer-1857: Tetra...