Word.ws English Dictionary

birthline

birthline noun: 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.

Noun

birthline (plural birthlines)

  1. 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.

Forms of birthline

pluralbirthlines

Origin of birthline

From birth + line.

Questions about birthline

What does birthline mean?
Birthline means 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.
What part of speech is birthline?
Birthline is a noun.
What is the plural of birthline?
The plural of birthline is birthlines.

Words near birthline in the dictionary

  1. birthiversary
  2. birthland
  3. birthlands
  4. birthless
  5. birthlessness
  6. birthline
  7. birthlines
  8. birthmark
  9. birthmarked
  10. birthmarks
  11. birthmate

Source and license

Adapted from Wiktionary: birthline (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “birthline.” Word.ws, https://word.ws/birthline. Based on Wiktionary, CC BY-SA 4.0.