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.

قوس ‘arc’

Arabic

References: Alm. MS Tunis: . – PH Morelon: I.8:2, 27:6. – Plan. Sidoli+Berggren: ?
Translation of:
Greek: περιφέρεια [Alm. Heiberg: I.9, 31:1. – PH Heiberg: I.8:2, 80:9-10]
Modern translations:
French: arc [PH Morelon: I.8:2, 26:8]
German: Bogen [PH Nix: I.8:2, 81:12]
English: arc [Plan. Sidoli+Berggren: ?]