"In today's language, it refers almost exclusively to characters who have an overall
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body, but have both female and male primary genitalia (although
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/
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are not always present, while a
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, and either a vagina or testicles are)."
MC has an overall feminine body, male primary genitalia, and does not have a vagina, which is not necessary to have to still be considered futa as stated above. It might not be the exact definition of futanari YOU were thinking of, but words change.