| 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) |
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| exanthem | <dermatology> Exanthem, an eruptive disease or its symptomatic eruption. (18 Nov 1997) |
| exanthem subitum | <dermatology> Also called baby measles. This is a nonserious but common childhood viral infection that starts with a high fever and swollen lymph glands. After 24 hours, the fever breaks and the child develops a red rash on the neck and trunk. (27 Sep 1997) |