| amentia | (noun) extreme mental retardation | Synonyms: idiocy |
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| astrantia | (noun) any plant of the genus Astrantia | Synonyms: masterwort |
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| dementia | (noun) mental deterioration of organic or functional origin | Synonyms: dementedness |
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| differentia | (noun) distinguishing characteristics (especially in different species of a genus) | - |
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| endodontia | (noun) the branch of dentistry dealing with diseases of the dental pulp | Synonyms: endodontics |
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| exodontia | (noun) the branch of dentistry dealing with extraction of teeth | Synonyms: exodontics |
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| oligodontia | (noun) congenital condition in which some of the teeth are missing | - |
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| orthodontia | (noun) the branch of dentistry dealing with the prevention or correction of irregularities of the teeth | Synonyms: dental orthopaedics, dental orthopedics, orthodontics, orthodonture |
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| periodontia | (noun) the branch of dentistry dealing with diseases of the gums and other structures around the teeth | Synonyms: periodontics |
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| prosthodontia | (noun) the branch of dentistry dealing with the replacement of teeth and related mouth or jaw structures by artificial devices | Synonyms: prosthodontics |
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