curie

https://dx.doi.org/10.1351/goldbook.C01444
Non-SI unit of radioactivity, Ci ≈ 3.7 × 10 10 Bq.
Source:
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 967
PAC, 1994, 66, 2513 (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2517