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.

bisect ‘bisect’

English

References: Alm. Toomer: 41; 42; 48; 82
Translation of:
Greek: διχοτομῶ [Alm. Heiberg: II.2, 91:6-7; I.5, 17:20; I.5, 18:20]
Greek: τέμνω δίχα [Alm. Heiberg: I.10, 32:13-14]
Greek: διαιρῶ δίχα [Alm. Heiberg: II.6, 101:19-20; II.6, 101:24]