microcurie: meaning, definition, pronunciation and examples
C2Technical / Scientific
Quick answer
What does “microcurie” mean?
A unit of radioactivity equal to one millionth of a curie.
Audio
Pronunciation
Definition
Meaning and Definition
A unit of radioactivity equal to one millionth of a curie.
A specific, relatively small measure of radioactive decay rate, primarily used in nuclear physics, medicine, and environmental monitoring to quantify minute amounts of radioactive material.
Dialectal Variation
British vs American Usage
Differences
No lexical difference. Usage conventions identical. The unit is defined and used internationally.
Connotations
Neutral, technical, precise. Carries connotations of scientific rigor and potential hazard.
Frequency
Extremely low frequency in general discourse. Used with equal rarity in UK and US specialized technical contexts.
Grammar
How to Use “microcurie” in a Sentence
[Quantity] of [Substance] measured in microcuriesThe [Sample/Source] has an activity of [Number] microcuriesRadiation levels are below [Number] microcuriesVocabulary
Collocations
Examples
Examples of “microcurie” in a Sentence
adjective
British English
- The microcurie source was carefully shielded.
- They detected microcurie-level contamination in the soil.
American English
- A microcurie source was used for calibration.
- The sample showed microcurie-level activity.
Usage
Meaning in Context
Business
Rare; only in contexts of nuclear energy, medical isotope supply, or environmental compliance reporting.
Academic
Standard in physics, nuclear engineering, radiochemistry, and nuclear medicine research papers and textbooks.
Everyday
Virtually never used.
Technical
The primary context. Used in lab reports, safety protocols, medical treatment plans (e.g., brachytherapy), and environmental radiation assessments.
Vocabulary
Synonyms of “microcurie”
Neutral
Weak
Vocabulary
Antonyms of “microcurie”
Watch out
Common Mistakes When Using “microcurie”
- Misspelling as 'microcurry' or 'microcure'.
- Using it as an adjective (e.g., 'the microcurie material' – better: 'the material with an activity of one microcurie').
- Confusing it with units of mass or energy.
FAQ
Frequently Asked Questions
No, it is a very small amount. A curie is a large unit (the activity of 1 gram of radium-226), so a microcurie is one-millionth of that. However, even microcurie amounts can be hazardous and require proper handling.
The standard symbol is μCi, where 'μ' is the Greek letter mu, denoting 'micro-' (one-millionth).
In professional nuclear fields and older equipment, yes. However, the International System of Units (SI) officially uses the becquerel (Bq). 1 μCi = 37,000 Bq. Many modern publications use Bq, but μCi remains prevalent in some countries and specific industries.
A typical household smoke detector contains about 1 microcurie of americium-241. A banana contains potassium-40 with about 0.1 microcuries of natural radioactivity.
A unit of radioactivity equal to one millionth of a curie.
Microcurie is usually technical / scientific in register.
Microcurie: in British English it is pronounced /ˌmaɪ.krəʊˈkjʊə.ri/, and in American English it is pronounced /ˌmaɪ.kroʊˈkjʊr.i/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: MICRO (very small) + CURIE (the scientist, Marie Curie, associated with radioactivity). A 'microcurie' is a tiny amount of radioactivity, named in honour of her work.
Conceptual Metaphor
RADIOACTIVITY IS A MEASURABLE SUBSTANCE / RADIOACTIVE DECAY IS A FLOW.
Practice
Quiz
In which field would you MOST likely encounter the term 'microcurie'?