Plural of caesium; multiple quantities, samples, or types of the chemical element caesium.
Regular plural of caesium, the metallic element. Used in scientific contexts discussing multiple amounts or varieties of the element.
In nuclear science and industrial applications, 'caesiums' refers to different isotopes—caesium-137 is famously radioactive and used in medical treatments, while other isotopes have completely different properties and dangers.
Complete word intelligence in one call. Free tier — 50 lookups/day.