noun
- plural of francium; the chemical element with atomic number 87, a highly radioactive alkali metal
Usage: chemistry term; typically used in scientific or academic contexts
Examples
- Franciums are among the rarest elements found in nature.
- The chemist studied the properties of franciums in the laboratory.
- Franciums decay rapidly due to their extreme radioactivity.
- Scientists have isolated only trace amounts of franciums from uranium ore.