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.

πλανώμενος ἀστήρ ‘planet’

Greek

References: Alm. Heiberg: I.8, 27:15
Translated into:
Arabic: النجم المتحيّر  [Alm. MS Tunis: ]
Modern translations:
English: planet [Alm. Toomer: 46]
Synonyms:
πλανώμενοι[Alm. Heiberg: I.8, 27:21-22 ; I.8, 28:13; I.8, 28:16; I.8, 28:23 . – PH Heiberg: I.5:1, 76:20]
πλανήτης[Alm. Heiberg: I.2, 9:11]