double vertical line

plural double vertical lines

1. The typographical character ‖; a symbol composed of two closely spaced line-height vertical lines.

   The whole tone unit stands between a double vertical line (double bars) ||.

   1998, Burkhard Dretzke, Modern British and American English Prononunciation: A Basic Textbook, page 89

2. Used other than figuratively or idiomatically: see double, vertical, line.

   In addition, Leibniz drew a double vertical line from line 36 to 37 (from “solidum est” to “Mechanice”[)].

   2008, Ursula Goldenbaum, Douglas Jesseph, Infinitesimal Differences: Controversies between Leibniz and his Contemporaries, →ISBN, page 86

   1 more example

   The ǁGana people (800 speakers—the double vertical line denotes a click sound) of Botswana have no generic word for living things, nor do they recognize a plant versus animal distinction.

   2007, K. David Harrison, When Languages Die:The Extinction of the World's Languages and the Erosion of Human Knowledge, page 39