| milligram | <unit> One thousandth of a gram. Abbreviation: mg (12 Jan 1998) |
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| milligram hour | An obsolete term for a unit of exposure in radium therapy, i.e., the application of 1 milligram of radium during 1 hour. Synonym: milligramage. (05 Mar 2000) |
| milligramage | An obsolete term for a unit of exposure in radium therapy, i.e., the application of 1 milligram of radium during 1 hour. Synonym: milligramage. (05 Mar 2000) |