noun
- Plural of cesium; a soft, silvery-white metallic element with atomic number 55, used in atomic clocks and photoelectric cells.
Usage: Also spelled 'caesiums' in British English.; Chemistry term; commonly encountered in science education and industrial contexts.
Examples
- Cesiums are highly reactive alkali metals that must be stored under mineral oil.
- The laboratory ordered several samples of cesiums for the spectroscopy experiment.
- Cesiums are used in atomic clocks because of their precise atomic vibrations.
- Different isotopes of cesiums have varying half-lives and applications in medicine.