ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  Alzheimers - a progressive form of presenile dementia that is similar to senile dementia except that it usually starts in the 40s or 50s; first symptoms are impaired memory which is followed by impaired thought and speech and finally complete helplessnesspresenile dementia - dementia with onset before the age of 65 |
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