Curie (noun)

1. A unit of radioactivity, defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
2. A unit of measurement for the activity of a sample of radioactive material, equal to 3.7 x 10^10 disintegrations per second.

Origin:

Named after marie and pierre curie, the french scientists who discovered radium and polonium.

Examples:

1. One curie is a large amount of radioactive material.
2. The source of radiation emitted one curie of radioactive material.
3. The radiation level was measured in curies.
4. The sample was found to have an activity of 0.1 curies.
5. The curie is named after Marie and Pierre Curie, who discovered radium.