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.

عقدة الرأس  ‘ascending node’

Arabic. – Grammar: n.

References: PH Morelon: I.15, 59:17-18
Modern translations:
Arabic: nœud de la tête [PH Morelon: I.15, 58]
Synonyms:
nœud de la tête[PH Morelon: I.15, 58]