The typographical character‖; a symbol composed of two closely spacedline-height vertical lines.
1998, Burkhard Dretzke,Modern British and American English Prononunciation: A Basic Textbook, page89:
The whole tone unit stands between adouble vertical line (double bars) ||.
Used other than figuratively or idiomatically:seedouble,vertical,line.
2007, K. David Harrison,When Languages Die:The Extinction of the World's Languages and the Erosion of Human Knowledge, page39:
The ǁGana people (800 speakers—thedouble vertical line denotes a click sound) of Botswana have no generic word for living things, nor do they recognize a plant versus animal distinction.
2008, Ursula Goldenbaum, Douglas Jesseph,Infinitesimal Differences: Controversies between Leibniz and his Contemporaries,→ISBN, page86:
In addition, Leibniz drew adouble vertical line from line 36 to 37 (from “solidum est” to “Mechanice”[)].