a short diagonal line (/) used between two words to show either is applicable (and/or), in dates or fractions (3/8), to express “per” (feet/second), etc.; slash
See virgule in American Heritage Dictionary 4
(vûrˈgyo͞ol)
noun Printing
A diagonal mark ( / ) used especially to separate alternatives, as in and/or, to represent the word per, as in miles/hour, and to indicate the ends of verse lines printed continuously, as in Old King Cole/Was a merry old soul.