Is it ensure, insure, or assure?
"unit of radioactivity," 1910, named for Pierre Curie (1859-1906) or his wife, Marie (1867-1934), discoverers of radium.
curie cu·rie (kyur'ē, kyu-rē')
A unit of radioactivity, equal to the amount of a radioactive isotope that decays at the rate of 3.7 × 1010 disintegrations per second.
Curie Cu·rie (kyur'ē, kyu-rē', kü-), Marie. Originally Manja Skłodowska.. 1867-1934.
Polish-born French chemist. She shared a 1903 Nobel Prize with her husband, Pierre Curie (1859-1906), and Henri Becquerel (1852-1908) for fundamental research on radioactivity. In 1911 she won a second Nobel Prize for her discovery and study of the elements radium and polonium.
A unit used to measure the rate of radioactive decay. Radioactive decay is measured by the rate at which the atoms making up a radioactive substance are transformed into different atoms. One curie is equal to 37 billion (3.7 × 1010) of these transformations per second. Many scientists now measure radioactive decay in becquerels rather than curies.
in physics, unit of activity of a quantity of a radioactive substance, named in honour of the French physicist Marie Curie. One curie (1 Ci) is equal to 3.71010 becquerel (Bq). In 1975 the becquerel replaced the curie as the official radiation unit in the International System of Units (SI).