| fornicate | (verb) have sex without being married | - |
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| fornication | (noun) voluntary sexual intercourse between persons not married to each other | - |
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| (noun) extramarital sex that willfully and maliciously interferes with marriage relations | Synonyms: adultery, criminal conversation |
| fornicator | (noun) someone who commits adultery or fornication | Synonyms: adulterer |
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| fornicatress | (noun) a woman adulterer | Synonyms: adulteress, hussy, jade, loose woman, slut, strumpet, trollop |
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| fornix | (noun) an arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodies | Synonyms: trigonum cerebrale |
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| (noun) generally any arch shaped structure (but often it refers to the arched roof of an anatomical space) | - |