BACKSPACE
backspace
(verb) hit the backspace key on a computer or typewriter keyboard; “To erase, you must backspace”
Source: WordNet® 3.1
Etymology
Noun
backspace (plural backspaces)
The key on a typewriter that moves the head one position backwards.
(computing) A keyboard key used for removing a character behind the cursor, and moving the cursor one position backwards.
(computing) The non-printable text character representing a backspace.
Verb
backspace (third-person singular simple present backspaces, present participle backspacing, simple past and past participle backspaced)
(computing) To remove a character behind a cursor.
(computing) To move a magnetic tape to a previous block.
Source: Wiktionary