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.

celum ‘heavens’

Latin. – Grammar: n.

References: Alm. Gerard: I.2:23, f. 2ra:24; I.6:66, f. 3rb:21
Translation of:
Arabic: السماء [Alm. MS Leiden: I.2:23, f. 3r:23. – Alm. MS Tunis: I.2:23, f. 2v:5]
Arabic: السماء [Alm. MS Leiden: I.6:66, f. 4v:28. – Alm. MS Tunis: I.6:66, f. 4v:5]