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.

γραμμικαὶ δείξεις ‘geometrical proofs’

Greek. – Grammar: pl..

References: Alm. Heiberg: II.9, 142:6
Translated into:
Arabic: براهين خطوطية [Alm. MS Tunis: 31a.3]
Arabic: حطوط المساحة [Alm. MS Leiden: f. 24v.3]
Modern translations:
English: geometrical proofs [Alm. Toomer: 99]