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.

inhabited world ‘inhabited world’

English

References: Alm. Toomer: 37; 75; 82
Translation of:
Greek: οἰκουμένη [Alm. Heiberg: II.1, 87:13; II.1, 88:3; I.2, 8:23; II.6, 101:16]