BACKSLASH
Etymology
Noun
backslash (plural backslashes)
The punctuation mark \.
(computing, rare, proscribed) Used erroneously in reference to, or in reading out, the ordinary slash, that is, the punctuation mark /.
Usage notes
• Sometimes used to indicate the beginning and ending of an area of words being marked for correction.
Synonyms
• reverse solidus
• slosh
• whack
Antonyms
• slash
Coordinate terms
• slash
Verb
backslash (third-person singular simple present backslashes, present participle backslashing, simple past and past participle backslashed)
(computing, transitive) To escape (a metacharacter) by prepending a backslash that serves as an escape character, thereby forming an escape sequence.
Source: Wiktionary