1. a unit of radioactivity equal to one millionth of a curie
Usage: scientific; physics

Examples

• The radioactive sample measured 50 microcuries.
• Safety regulations limit exposure to 10 microcuries per day.
• The medical isotope contained only a few microcuries of radiation.
• Scientists detected traces measuring 0.5 microcuries in the soil.
• The laboratory equipment can measure down to one microcurie.
• Nuclear medicine procedures typically use microcurie amounts of radioactive material.