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.

أعظم الدوائر‘great circle’

Arabic

References: Alm. MS Tunis:
Translation of:
Greek: μέγιστος κύκλος [Alm. Heiberg: I.8, 29:4-5 ; I.14, 77:4-5. – PH Heiberg: I.3:1, 74:5]
Synonyms:
دائرة عظيمة [Alm. MS Tunis: ]
دائرة من الدوائر العظام[PH Morelon: I.3:1, 19:4]
فلك أعظم[Alm. MS Leiden: f. 5v]
فلك عظيم[Alm. MS Leiden: f. 12v]