calcium
B2Neutral to Technical
Definition
Meaning
A soft, silver-white metallic chemical element (symbol Ca) with atomic number 20, essential for life.
Refers to the element itself, its compounds (e.g., calcium carbonate), or its presence in biological systems (e.g., bones, blood).
Linguistics
Semantic Notes
Primarily used in scientific, nutritional, and medical contexts. Its meaning is highly specific and non-figurative.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or spelling. Pronunciation differs slightly (see IPA).
Connotations
None beyond its scientific/nutritional referent.
Frequency
Equally common in both varieties due to universal scientific and nutritional discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
N + of + calcium (e.g., 'a source of calcium')calcium + N (e.g., 'calcium tablet')Adj + calcium (e.g., 'dietary calcium')Vocabulary
Synonyms
Strong
Weak
Usage
Context Usage
Business
Used in the context of supplement sales, fortified food marketing, or pharmaceutical industries.
Academic
Core term in chemistry, biology, biochemistry, medicine, nutrition, and geology.
Everyday
Common in discussions about diet, bone health (osteoporosis), and dental care.
Technical
Precise reference to the element, its ions (Ca²⁺), isotopes, or its role in physiological processes (e.g., muscle contraction, neural signalling).
Examples
By Part of Speech
verb
British English
- The soil was calcified over centuries.
- The process will calcify the deposits.
American English
- The arteries can calcify over time.
- The water calcifies the pipes.
adjective
British English
- The calcium-rich water left limescale.
- She takes a high-calcium milk.
American English
- We need a calcium-fortified orange juice.
- He has a calcium-deficient diet.
Examples
By CEFR Level
- Milk has a lot of calcium.
- Calcium is good for your bones.
- You need calcium to keep your teeth strong.
- Some vegetables, like broccoli, contain calcium.
- A severe calcium deficiency can lead to osteoporosis in later life.
- The doctor recommended a supplement to increase my daily calcium intake.
- The regulation of intracellular calcium ions is critical for cardiac muscle contraction.
- Calcium carbonate deposition forms the striking white cliffs of Dover.
Learning
Memory Aids
Mnemonic
Think of CALCIum in your CALCium (bones) - the 'calc' root relates to limestone/chalk (calcium carbonate), which is found in bones.
Conceptual Metaphor
STRENGTH/FOUNDATION (e.g., 'Calcium is the building block of strong bones.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- False friend: Russian 'кальций' (kal'tsiy) is a direct cognate, so no trap. Pronunciation is similar.
Common Mistakes
- Misspelling as 'calcuim' or 'calsium'.
- Incorrectly using 'calcium' as a countable noun (e.g., 'eat two calciums' instead of 'take two calcium tablets').
Practice
Quiz
What is the primary biological role of calcium in the human body?
FAQ
Frequently Asked Questions
Yes, calcium is a metallic element, but in biological contexts, it is referred to as a mineral.
Canned fish with bones (sardines), leafy green vegetables (kale, bok choy), fortified plant milks, tofu set with calcium sulfate, and almonds.
It is a common calcium compound (CaCO3) found in rocks (limestone, chalk), shells, and eggshells. It is also used in antacids and as a dietary supplement.
Yes, excessive calcium intake, especially from supplements, can lead to hypercalcemia, which may cause kidney stones, constipation, and interfere with the absorption of other minerals.