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.

parallel ‘parallel’

English

References: Alm. Toomer: 38; 64; 84
Translation of:
Greek: παράλληλος [Alm. Heiberg: II.6, 105:1,14]
Greek: παράλληλος [Alm. Heiberg: I.3, 10:8; I.13, 69:6]