Definitions

1. noun

A soft, silvery-white, highly reactive, and highly flammable alkali metal of the earth’s crust, used in medicine, fertilizers, and in the production of soap, glass, and other materials.

“The patient was administered potassium supplements to stabilize her heart rate.”

2. noun

A chemical element of the alkali metal group, with the symbol K, and atomic number 19.

“The chemist studied the properties of potassium in its various compounds.”