backquote

listen to the pronunciation of backquote
Englisch - Englisch
The symbol `

The form that follows the backquote is not evaluated, except for certain items.

The character ` Not the same as a single quote (') Does command substitution (9 16)
n the standard character that is variously called "grave accent" or "backquote" (`) See Figure~2--5
n the standard character that is variously called "grave accent" or "backquote" (`) See Figure~2--5 @IGindex{backslash}