A female person who performs fellatio; a woman who engages in oral sex.
From fellate plus the Italian/Latinate feminine agent suffix -trice, used in English to specify a female performer, parallel to words like 'executrix' or 'dominatrice'.
Fellatrice shows how English borrowed the whole apparatus of Latinate gender-marking from Italian medical texts, creating an explicitly feminine form that modern English largely ignores in favor of gender-neutral 'fellator'.
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