Ptolemaeus Arabus et Latinus

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τὸ τοῦ μεσημβρινοῦ ἐπίπεδον ‘the plane of the meridian’

Greek

Translated into:
References:	Alm. Heiberg: II.5, 98:16
Arabic:	سطح دائرة نصف النهار [Alm. MS Tunis: 21b.12]
Arabic:	سطح فلك نصف النهار [Alm. MS Leiden: f. 16r]
Modern translations:
English:	the plane of the meridian [Alm. Toomer: 80]