LSJἀντιγώνιοςGlossmarking opposite angles,ἀντιγώνιος,ον,A. marking opposite angles,of stars in a quadrilateral, Hipparch. 3.4.3 , Ptol. Alm. 7.1 .ReferencesHipparch. 3.4.3Ptol. Alm. 7.1