| Boston exanthema | A viral disease resembling exanthema subitum, with the exanthema, if it develops, appearing after the fever has subsided; it is caused by strain 16 of ECHO virus. Origin: after the city in which an epidemic occurred (05 Mar 2000) |
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| Boston opium | Opium so diluted after importation as barely to meet the official requirements. Synonym: pudding opium. (05 Mar 2000) |