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.

the complementary angle ‘complementary angle’

English

References: Plan. Sidoli+Berggren: ?
Translation of:
Arabic: الزاوية الباقية [Plan. Sidoli+Berggren: 193, 300]