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birthline. In DICTIOUS you will not only get to know all the dictionary meanings for the word
birthline, but we will also tell you about its etymology, its characteristics and you will know how to say
birthline in singular and plural. Everything you need to know about the word
birthline you have here. The definition of the word
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English
Etymology
From birth + line.
Noun
birthline (plural birthlines)
- (astronomy) A predicted line on the Hertzsprung-Russell diagram that relates the effective temperature and luminosity of pre-main-sequence stars at the start of their contraction.