calcium
UK: ˈkælsiəm | US: ˈkælsiəm
n. a soft, silver-white metallic chemical element (symbol Ca), essential for living organisms and found in bones, teeth, and minerals like limestone.
The word "calcium" originates from the Latin calx (genitive calcis), meaning "lime" or "limestone." The suffix -ium is a standard ending for metallic elements in chemistry (e.g., sodium, magnesium). The term reflects calcium's natural occurrence in limestone and its role in biological structures like bones and shells. The logical progression ties the element’s source (lime) to its modern scientific classification.
Calcium is vital for maintaining strong bones and teeth.
Dairy products like milk are rich sources of calcium.
The geologist analyzed the calcium content in the rock sample.
A calcium deficiency can lead to osteoporosis in older adults.
Plants absorb calcium from the soil to support cell growth.