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.

λείπειν ἐκείνων εἰς τὸ ἡμικύκλιον‘supplement’

Greek

References: Alm. Heiberg: I.10, 38:6-7
Translated into:
Arabic: وتر القوسي الباقية من نصف الدائرة [Alm. MS Tunis: ]
Arabic: وتر لباقي نصف الدائرة [Alm. MS Leiden: f. 6v]
Modern translations:
English: supplementary [Alm. Toomer: 51]
Synonyms:
αἱ λείπουσαι εἰς το ἡμικύκλιον μοίραι[Alm. Heiberg: I.10, 36:6]
αἱ λείπουσαι εἰς το ἡμικύκλιον περιφέρειαι[Alm. Heiberg: I.10, 35:20]
αἱ λοιπαὶ εἰς το ἡμικύκλιον (μοίραι)[Alm. Heiberg: II.5, 100:8]
ἡ λείπουσα εἰς το ἡμικύκλιον[Alm. Heiberg: II.5, 100:4; I.10, 42:2-3; I.10, 47:19-20]