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.

سطر ‘set of columns’

Arabic

References: Alm. MS Leiden: f. 16r
Translation of:
Greek: μέρος τῶν σελιδίων [Alm. Heiberg: II.4, 97:21, 98:1]
Synonyms:
قسم من صفوف[Alm. MS Tunis: 21b.4-5]