| 单词 | luminosity | 
| 释义 | Word Frequency luminosity(ˌluːmɪˈnɒsɪtɪ) nounWord forms:  plural -ties 1.  the condition of being luminous  2.  something that is luminous 3.  astronomy a measure of the radiant power emitted by a star  4.  physics the attribute of an object or colour enabling the extent to which an object emits light to be observed    Former name: brightness.  See also colour   | 
	
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