backtick

The symbol `, resembling a reversed quotation mark and also being, or being…The symbol `, resembling a reversed quotation mark and also being, or being homoglyphic to (depending on mental model), a grave accent mark in isolation. (Common uses include (1) use as a dead key in composing grave-accented characters, (2) use as an escape character to mark literals, and (3) many other uses as defined by contexts.)