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.

circumference‘circumference’

English

References: Alm. Toomer: 48; 65. – PH Hamm: I.3:1, 46:17. – Plan. Sidoli+Berggren: ?
Translation of:
Greek: περιφέρεια [Alm. Heiberg: I.13, 70:19. – PH Heiberg: I.3:1, 74:7]
Greek: περίμετρος [Alm. Heiberg: I.10, 31:11]
Arabic: الخطّ المحيط [Plan. Sidoli+Berggren: 453, 455, 458]