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.

خفيف ‘light (adj)’

Arabic. – Grammar: adj.

References: Alm. MS Tunis: I.1:17, f. 2r:21
Translation of:
Greek: κοῦφον [Alm. Heiberg: I.1, 7:15]
Synonyms:
الخفيف[Alm. MS Leiden: I.1:17, f. 3r:9]