decibar
C1Technical/Scientific
Definition
Meaning
A unit of pressure, equal to one-tenth of a bar, primarily used in oceanography and meteorology.
A measurement representing approximately the pressure increase equivalent to a one-meter descent in seawater; used for quantifying hydrostatic pressure in scientific contexts.
Linguistics
Semantic Notes
This is a highly specific, unit-of-measurement term. It belongs to the International System (SI) of derived units. It is not used in everyday contexts and lacks metaphorical or extended meanings.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning, spelling, or usage between British and American English, as it is a standard scientific term.
Connotations
None beyond its technical definition.
Frequency
Extremely low frequency in general language. Usage is confined to technical fields like oceanography, meteorology, and geophysics in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
[Number] + decibarsa pressure of + [Number] + decibarsVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Not used.
Academic
Used in scientific papers, particularly in oceanography, meteorology, and geophysics, to report pressure measurements.
Everyday
Virtually never used.
Technical
The primary context. Used in technical specifications, research data, and instrumentation (e.g., pressure sensors calibrated in decibars).
Examples
By Part of Speech
adjective
British English
- The decibar reading was crucial for the model.
American English
- The sensor provides decibar pressure data.
Examples
By CEFR Level
- Scientists often measure ocean pressure in decibars.
- The CTD cast recorded a pressure of 2450 decibars at the seafloor, corresponding to a depth of approximately 2450 meters.
Learning
Memory Aids
Mnemonic
Think: 'DECI' means one-tenth (like in decimetre). A 'BAR' is a unit of pressure. So, a decibar is one-tenth of a bar.
Conceptual Metaphor
Pressure as depth: In oceanography, decibars are used interchangeably with depth in meters for practical purposes (1 decibar ≈ 1 meter of seawater pressure).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'децибел' (decibel), which is a unit of sound intensity. 'Decibar' is 'децибар' in Russian.
Common Mistakes
- Misspelling as 'decible', 'decibal', or 'desibar'.
- Confusing it with the more common 'decibel'.
- Using it in non-scientific contexts.
Practice
Quiz
What field is the unit 'decibar' primarily associated with?
FAQ
Frequently Asked Questions
No, they are completely different units. A decibel (dB) measures sound intensity or power ratio. A decibar (dbar) measures pressure.
One decibar equals 10,000 pascals (10 kPa).
Because the pressure increase due to seawater is roughly 1 decibar per meter of depth, allowing depth and pressure to be used almost interchangeably.
Typically not. It is found only in specialised scientific and technical dictionaries due to its extremely low frequency in general language.