expansivity
/iks'pænsivnis/ Cách viết khác : (expansivity) /,ekspæn'siviti/
Học thuậtThân thiện
Definition
Noun 1. A measure of thermal expansion: The fractional change in length, area, or volume of a material per unit change in temperature at a given constant pressure. This is a precise physical property. 2. The quality of being expansive: The state or characteristic of covering a wide area in range or scope; largeness, extensiveness, or comprehensiveness. 3. An open, communicative, and effusive quality: A friendly, open, and talkative trait in a person's character or manner.
Usage Examples
- As a physical property (most common technical use):
- The expansivity of the metal must be considered when designing the bridge to accommodate temperature changes.
- Engineers calculated the coefficient of thermal expansivity for the new ceramic compound.
- Referring to largeness or scope:
- The expansivity of the desert landscape was both beautiful and daunting.
- The report lacked the expansivity needed to cover such a complex topic thoroughly.
- Referring to a personal quality:
- Her natural expansivity made her an excellent host, putting everyone at ease.
- He was known for his expansivity, often engaging strangers in long, friendly conversations.
Advanced Usage
- Coefficient of thermal expansivity: This is the full technical term for the physical property, often abbreviated as CTE. It is a critical parameter in materials science, engineering, and construction.
- The different coefficients of thermal expansivity between the glass and the metal frame caused the seal to fail.
Variants and Related Words
- Expansive (adjective):
- Covering a wide area; extensive. (an expansive view of the valley)
- Comprehensive and wide-ranging. (an expansive discussion)
- Open, communicative, and effusive. (He was in an expansive mood.)
- Expansiveness (noun): Often used interchangeably with the second and third definitions of , particularly for personal qualities or scope. ()
Different Meanings / Contexts
- Physics/Materials Science: Predominantly refers to the quantitative measure of thermal expansion (coefficient of thermal expansivity).
- General Description: Can describe something that is wide-ranging, extensive, or comprehensive in scale or thought.
- Psychology/Social Context: Describes a personality trait marked by openness, communicativeness, and a lack of restraint.
Synonyms
- For the physical property: thermal expansion coefficient.
- For largeness/scope: extensiveness, comprehensiveness, broadness, vastness.
- For the personal quality: effusiveness, communicativeness, openness, gregariousness, sociability.
Antonyms
- For the personal quality: reserve, reticence, taciturnity, introversion.
- For largeness/scope: limitedness, narrowness, restriction.
Noun
- a friendly open trait of a talkative person
- a quality characterized by magnificence of scale or the tendency to expand
- the expansiveness of their extravagant life style was soon curtailed
- the fractional change in length or area or volume per unit change in temperature at a given constant pressure