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.

winter solstice ‘winter solstice’

English

References: Alm. Toomer: 41; 69
Translation of:
Greek: χειμερινὴ τροπή [Alm. Heiberg: I.5, 17:17, 18:3-4]
Greek: χειμερινὸν τροπικόν [Alm. Heiberg: I.14, 76:23]