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.

ἰσημερινὴ ἡμέρα ‘equinoctial day’

Greek

References: Alm. Heiberg: II.3, 94:2-3
Translated into:
Arabic: النهار المعتدل [Alm. MS Leiden: f. 15r. – Alm. MS Tunis: 20b.11]
Modern translations:
English: equinoctial day [Alm. Toomer: 78]
Synonyms:
ἰσημερία[Alm. Heiberg: I.5, 18:1]