dominatrix

A dominatrix (from the Latin dominatrix, meaning a female ruler or mistress) or mistress is a woman who takes the dominant role in bondage and discipline, domination and submission or sado-masochistic sexual practices, which are commonly abbreviated as BDSM. The male equivalent is master. A common form of address for a submissive to a dominatrix is “Mistress” or “Ma’am”. Note that a dominatrix does not necessarily dominate a male partner; a dominatrix may well have a female submissive.