τετρᾰγων-ίζω,
A. make square, square, of lines or numbers, Pl. R. 527a , Arist. Metaph. 996b21 ;ὅσαι γραμμαὶ τὸν ἰσόπλευρον . . ἀριθμὸν τετραγωνίζουσιall lines whichforman equilateral numberas their square, Pl. Tht. 148a ;τ. τὸν κύκλον squarethe circle, Arist. SE 171b16 :— Pass. ,
Id. APr. 69a31 .
2. Astrol.,to be in quartile aspect, Ptol. Tetr. 34 .