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Pronunciation varies by accent · noun
(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..
Use birthline when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Birthline means (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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use birthline where its definition matches the intended context.
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