kilobar
C1-C2Highly technical/scientific
Definition
Meaning
A unit of pressure equal to one thousand bars (approximately equal to atmospheric pressure at sea level multiplied by 1000).
In geology and geophysics, used to express deep-Earth pressures, such as those within the mantle or core. Also encountered in some industrial contexts involving extreme pressure systems.
Linguistics
Semantic Notes
Exclusively a unit of measurement. Not used figuratively. Belongs to the same morphological family as 'bar', 'millibar', 'megabar'. Its primary domain is high-pressure physics, petrology, and geodynamics.
Dialectal Variation
British vs American Usage
Differences
No lexical or definitional differences. Usage frequency and context are identical in both varieties, confined to scientific literature.
Connotations
Neutral, precise, technical.
Frequency
Extremely low frequency in general language. Appears almost exclusively in specialized journals, textbooks, and technical reports in fields like solid-Earth geophysics or high-pressure material science.
Vocabulary
Collocations
Grammar
Valency Patterns
[number] kilobars of pressurepressure reaches/tops/exceeds [number] kilobarsat [number] kilobarsVocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Virtually never used.
Academic
Used in geology, geophysics, physics, and engineering papers discussing high-pressure phenomena.
Everyday
Never used.
Technical
Core usage context. Appears in specifications for industrial pressure vessels, research into mineral phase transitions, and studies of planetary interiors.
Examples
By Part of Speech
noun
British English
- The mineral remains stable up to pressures of about 40 kilobars.
- The experiment was conducted in a multi-anvil press capable of achieving 200 kilobars.
American English
- Diamond formation requires pressures exceeding 50 kilobars.
- The researchers simulated mantle conditions at 130 kilobars and 1500°C.
Examples
By CEFR Level
- Scientists study rocks formed under extreme pressure, sometimes many kilobars.
- The phase transition of olivine to wadsleyite occurs at approximately 14 kilobars, marking the upper boundary of the upper mantle.
- Calibrating such high-pressure apparatus to deliver precise kilobar loads requires exceptional engineering.
Learning
Memory Aids
Mnemonic
Think 'kilo' (thousand) + 'bar' (unit of pressure). Like a kilogram is 1000 grams, a kilobar is 1000 bars of pressure.
Conceptual Metaphor
PRESSURE IS A FORCE/WEIGHT (e.g., 'The weight of overlying rock creates kilobar pressures').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'килобар' which is a direct transliteration and identical in meaning. Ensure correct conversion when translating numerical values involving 'атмосферы' (atmospheres) or 'паскали' (pascals).
Common Mistakes
- Using it as a general adjective for 'high pressure' (e.g., 'kilobar conditions' is fine, 'kilobar force' is not). Misspelling as 'killobar'. Incorrect pluralisation ('kilobars', not 'kilobar').
Practice
Quiz
In which context would you most likely encounter the unit 'kilobar'?
FAQ
Frequently Asked Questions
No, it is a highly specialized technical term used only in specific scientific fields dealing with extreme pressures.
One bar is approximately equal to 0.987 atmospheres. Therefore, one kilobar is roughly 987 atmospheres.
No, it would be entirely out of place. For everyday high-pressure contexts (like tyres or scuba tanks), units like psi, bar, or atmospheres are used.
The plural is 'kilobars' (e.g., 'twenty kilobars').