luminosity
UK/.lu:mi'nɒsiti/US
TOEFLC2
Definitions
n.
The quality of being luminous; brightness or radiance.
发光的性质；亮度、光辉。
n.
In astronomy, the total amount of light a star or object emits.
（天文学）恒星或天体发出的光的总量；光度。
Root Breakdown
Root-derivedFrom luminous + -ity ('state, quality') = 'the state of being luminous,' i.e. how much glow there is. Everyday it means brightness; in astronomy it's the precise, measurable amount of light a star pours out.
Root lumin still carries 7 more wordsCommon Collocations
- 1.high/low luminosity高/低光度
- 2.luminosity of a star恒星的光度
- 3.luminosity distance光度距离
- 4.increased luminosity增强的亮度
Example Sentences
- 1.
Astronomers measure a star's luminosity to estimate its true size.
- 2.
The screen's high luminosity made it readable even in bright sunlight.
- 3.
Her paintings are admired for the soft luminosity of their colors.