dry-bulb temperature
C2Technical/Scientific
Definition
Meaning
The actual temperature of the air as measured by a standard thermometer shielded from direct sunlight and moisture.
In meteorology, climatology, and HVAC (Heating, Ventilation, and Air Conditioning), it is the fundamental air temperature measurement, typically contrasted with wet-bulb temperature to determine humidity.
Linguistics
Semantic Notes
The term is almost always used in contrast to 'wet-bulb temperature.' It refers to a specific measurement technique and is not a synonym for 'air temperature' in everyday language, though it technically is air temperature.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or pronunciation differences. The term is technical and used identically.
Connotations
Identical technical connotations in both varieties.
Frequency
Equally rare outside specific fields (meteorology, HVAC engineering).
Vocabulary
Collocations
Grammar
Valency Patterns
The dry-bulb temperature is [number]°C.Measure the dry-bulb temperature in the shade.Calculate humidity using the dry-bulb and wet-bulb temperatures.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “(none – a technical term)”
Usage
Context Usage
Business
Used in contracts or reports for HVAC system specifications or environmental monitoring.
Academic
Common in engineering, meteorology, and environmental science papers and textbooks.
Everyday
Extremely rare; ordinary speakers simply say 'temperature'.
Technical
The standard, precise term in meteorology and HVAC for the basic air temperature measurement.
Examples
By Part of Speech
verb
British English
- The sensor will dry-bulb temperature the air in the chamber. (Note: This term is almost exclusively a noun compound; it is not used as a verb.)
American English
- (Not used as a verb.)
adverb
British English
- (Not used as an adverb.)
American English
- (Not used as an adverb.)
adjective
British English
- The dry-bulb reading was essential for the calculation.
American English
- We need the dry-bulb data point from the psychrometric chart.
Examples
By CEFR Level
- (This term is too technical for A2 level.)
- The weather report gives the dry-bulb temperature, which is what you feel.
- To design an efficient air conditioning system, engineers must first determine the design dry-bulb temperature for the location.
- The psychrometric chart plots dry-bulb temperature on the horizontal axis, enabling the rapid determination of all other moist air properties.
Learning
Memory Aids
Mnemonic
Think of a dry thermometer bulb (the silver part) – it's dry, so it measures just the heat, not the cooling effect of evaporation.
Conceptual Metaphor
BASELINE/THE NORM (it is the standard against which the more specialised 'wet-bulb' measurement is compared).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation 'температура сухой колбы'. The accepted term is 'температура сухого термометра' or simply 'температура воздуха' in non-technical contexts.
- Do not confuse with 'сухая температура' which is nonsensical. The concept is the temperature *measured by* a dry bulb.
Common Mistakes
- Using 'dry-bulb temperature' in everyday conversation instead of just 'temperature'.
- Omitting the hyphen: 'dry bulb temperature'.
- Using it without the contrasting concept of 'wet-bulb temperature' where technical precision is required.
Practice
Quiz
In which field is the term 'dry-bulb temperature' most precisely and frequently used?
FAQ
Frequently Asked Questions
Essentially, yes. Your weather app's 'air temperature' is a dry-bulb temperature measurement. The term 'dry-bulb' is used for technical precision, especially when contrasted with wet-bulb temperature.
It refers to the bulb (the sensor) of a standard thermometer which is kept dry, as opposed to a 'wet-bulb' thermometer whose bulb is covered with a water-moistened wick.
You would use it primarily in technical, engineering, or scientific contexts where you are specifically discussing measurements of air properties and need to distinguish it from wet-bulb temperature, dew point, or other related metrics.
No, never. The wet-bulb temperature, lowered by evaporative cooling, is always less than or equal to the dry-bulb temperature. They are equal only when the air is saturated (100% relative humidity).