Permissiveness may refer to:
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Permissiveness (endocrinology), between hormones and cells.
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Permissiveness (virology), between viruses and cells.
Permissive may refer to:
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Permissive society, a liberalization of social norms in a society.
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Permissive software license, a free-software license.
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Permissive cell or permissive host, a cell which allows a virus to circumvent its defenses and replicate.
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Permissive mood, a grammatical mood found in some languages.
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Permissive (film), a 1970 British exploitation drama film.