The double hyphen (＝, ゠, or ⸗) is a punctuation mark that consists of two parallel hyphens. It is not to be confused with two consecutive hyphens (--), which usually represents an em dash (—) or en dash (–). In order to avoid its being confused with the equals sign (=), the double hyphen is often sheared slightly.
Famous quotes containing the word double:
“No slavery can be abolished without a double emancipation, and the master will benefit by freedom more than the freed-man.”
—Thomas Henry Huxley (1825–95)