Word.ws English Dictionary

Population I

Population I proper noun: a population or group of stars formed relatively late in the history of the Universe, characterized by having a high metallicity.

Proper noun (1)

Population I

  1. (attributive, usually) A population or group of stars formed relatively late in the history of the Universe, characterized by having a high metallicity.
    • We generally place stars into one of three populations based on their metallicity. Population I stars like the Sun are metal heavy. They are younger stars and tend to be found in the spiral arms of the Milky Way.2019 December 11, Brian Koberlein, “The Stars In Our Galaxy Are More Varied Than We Thought”, in Forbes, archived from the original on 15 Sep 2022
    • Most stars, such as the sun, are third-generation "Population I" stars that contain relatively heavy elements such as iron, nickel, carbon and oxygen.2021 May 21, Tom Metcalfe, “An ancient star casts new light on the birth of the universe”, in NBC News, archived from the original on 06 Jul 2022

Proper noun (2) capitalized: population I

population I

  1. Alternative letter-case form of Population I.

Forms of Population I

alternative formpopulation I

Origin of Population I

Proposed by astronomer Walter Baade in 1944.

Words formed from Population I

Questions about Population I

What does Population I mean?
Population I means a population or group of stars formed relatively late in the history of the Universe, characterized by having a high metallicity.
What part of speech is Population I?
Population I is a proper noun.

Words near Population I in the dictionary

  1. population bottlenecks
  2. population densities
  3. population density
  4. population dynamics
  5. population genetics
  6. Population I
  7. Population II
  8. Population III
  9. population inversion
  10. population inversions
  11. population mean

Source and license

Adapted from Wiktionary: Population I (page history and authors); population I (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.

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