potassium
potassium — noun
1. a metal element with a soft, silver-white appearance that is usually found joine
a metal element with a soft, silver-white appearance that is usually found joined to other elements and helps make things such as fertilizer, soap, and glass.
Pure potassium stays under oil so it does not react too quickly.
pure potassium under oil
Potassium burned brightly when the teacher dropped a tiny piece into water.
potassium reacts with water
In spring, farmers add potassium to soil before planting tomatoes.
The factory needs potassium compounds for soap and glass production.
Mina pointed to potassium on the chart in chemistry class.
- K
the chemical symbol, used in formulas, charts, and labels rather than ordinary explanation
- potash
often refers to potassium compounds, especially in farming or industry, so it is less exact than the element name
- potassium metal
a narrower term for the pure reactive form
文法句型
potassium reacts with water
potassium compounds
add potassium to soil
pure potassium under oil
用法筆記
Usually uncountable. In many contexts, speakers mean potassium as part of compounds or materials rather than a piece of the pure metal.