PAL

Ptolemaeus Arabus et Latinus

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% (the percent sign) is the placeholder for no, one or more than one character.
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At the beginning and at the end, these placeholders are superfluous.

ἐγκεκλιμένη σφαίρα‘sphaera obliqua’

Greek

References: Alm. Heiberg: I.5, 17:15
Translated into:
Arabic: الفلك المائل [Alm. MS Leiden: f. 4v]
Arabic: الكرة المائلة [Alm. MS Tunis: ]