PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

ἡλιακὴ σφαίρα‘solar sphere’

Greek

References: PH Heiberg: I.8:1, 80:3
Translated into:
Arabic: كرة الشمس [PH Morelon: I.8:1, 27:2]
Modern translations:
English: solar sphere [PH Hamm: I.8:1, 50:3]