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.

γραμμικὴ ἔφοδος ‘geometrical method’

Greek

References: Alm. Heiberg: I.2, 9:16
Translated into:
Arabic: طريق هندسيّ [Alm. MS Tunis: I.2:26, f. 2v:13]
Arabic: طريق مسّاحيّ [Alm. MS Leiden: I.2:26, f. 3r:33]
Modern translations:
English: geometrical method [Alm. Toomer: 38]