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.

eccentric circle ‘eccentric circle’

English

References: Alm. Toomer: 141
Translation of:
Greek: ἔκκεντρος κύκλος [Alm. Heiberg: III.3, 217:8; III.3, 219:23,24,27]
Synonyms:
eccentre[Alm. Toomer: 145]