a unit of radioactivity equal to one thousandth of a curie; 3.70 × 107disintegrations per second
Abbreviation: mCi, mc
Word origin
[1905–10; milli- + curie]This word is first recorded in the period 1905–10. Other words that entered Englishat around the same time include: Expressionism, airway, cadre, push-up, revolving doormilli- is a combining form meaning “thousand” (millipede): in the metric system, used in the names of units equal to one thousandth of thegiven base unit (millimeter). Other words that use the affix milli- include: milliequivalent, millilux, millimicron, milliroentgen, milliwatt