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.

نظام‘order’

Arabic. – Grammar: n.

References: PH Morelon: I.1:5, 17:4
Translation of:
Greek: τάξις [Alm. Heiberg: I.2, 8:17, 9:1. – PH Heiberg: I.1:5, 70:23; I.2:3, 72:20]
Modern translations:
French: système [PH Morelon: I.1:5, 16:7]
Synonyms:
ترتيب[PH Morelon: I.2:3, 17:17]
مرتبة[Alm. MS Leiden: I.2:22, f. 3r:22. – Alm. MS Tunis: I.2:22, f. 2v:4]