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.

الدائرة الاستوائية ‘equator’

Arabic

References: Alm. MS Tunis:
Translation of:
Greek: ἰσημερινός [Alm. Heiberg: I.5, 17:18; I.8, 18:20. – PH Heiberg: I.3:1, 74:6; I.4:3, 76:9]
Synonyms:
دائرة معدّل النهار[Plan. Sidoli+Berggren: ?]
فلك معدّل النهار[PH Morelon: I.3:1, 19:4-5]
معدّل النهار[Plan. Sidoli+Berggren: 18, 30, 46, 133, 157, 425]
معدّل النهار[Alm. MS Tunis: . – PH Morelon: I.4:3, 21:6]