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.

in gleichmäßig schneller Bewegung‘with a uniform speed’

German

References: PH Nix: I.3:2, 75:14
Translation of:
Arabic: (حركة) مستوية السرعة  [PH Morelon: I.3:2, 19:7-8]
Synonyms:
in gleichmäßiger Bewegung[PH Nix: I.10:10, 89:18-19]
in gleichmäßiger Bewegung[PH Nix: I.8:3, 81:14-15]