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.

tour ‘revolution’

French

References: PH Morelon: I.4:4, 20:13
Translation of:
Arabic: دوران  [PH Morelon: I.4:4, 21:9]
Synonyms:
mouvement[PH Morelon: I.4:3, 20:10]
rotation[PH Morelon: I.4:1, 20:1]