em dash

• em rule, emdash, em-dash, m dash, m-rule, mutton dash

Named for its width, which is equal to the width of the letter m or M, or approximately twice the width of an en dash.

em dash (plural em dashes)

1. (typography) The symbol (—) (used to demarcate a parenthetical thought or to indicate a break, or for emphasis)

These symbols are often identical in appearance and can be used as quotation dashes:

• — (em dash)
• ― (horizontal bar)

• en dash
• hyphen
• rule

• Hameds, mashed, shamed