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.

la sphère de la lune ‘lunar sphere’

French

References: PH Morelon: I.9:1, 28:2
Translation of:
Arabic: كرة القمر [Alm. MS Tunis: I.1:10, f. 2r:4. – PH Morelon: I.9:1, 29:2]