διάμετρ-ος,ον,
A. diametrical: Astrol.,diametrically opposed,
Ptol. Tetr. 115 , Man. 1.89 .
II. Subst. δ.(sc.γραμμή),ἡ,diagonalof a parallelogram, Pl. Men. 85b ,al.;κατὰ δ. συντίθεσθαι,of triangles,by the hypotenuses,
Id. Ti. 54d ;diameterof a circle, Arist. Cael. 271a12 , etc.;axisof a sphere, Id. MA 699a29 ;diameterof other curves, Apollon.Perg. Con. 1
Def. 1 ;axisof a conic, Archim. Aequil. 2.10 ;ἡ κατὰ διάμετρον σύζευξις,of circles, Arist. EN 1133a6 ; τὰ κατὰ δ.
Id. Cael. 277a24
; κεῖσθαι κατὰ δ.
Id. Mete. 363a34
, al.;κατὰ δ. κινεῖσθαι,of quadrupeds, which move the legscross-corner-wise,as horses whentrotting(opp.κατὰ πλευρὰν κινεῖσθαιambling, in which the legs on either side move together), Id. HA 490b4 , IA 712a25 , cf. Plu. 2.43a ;ἐκ διαμέτρου ἀντικείμενος,of planets,in opposition, PMag. Par.
1.2221 ; ἐκ διαμέτρου ἡμῖν οἱ βίοι
Luc. Cat. 14