Word.ws English Dictionary

quaternary twin

quaternary twin noun: first cousins whose parents are a pair of identical twins.

Noun

quaternary twin (plural quaternary twins)

  1. First cousins whose parents are a pair of identical twins.
    • Quaternary twins are defined as the offspring born less than nine months apart to two sets of identical siblings. They don’t share a womb, or even a parent, but the DNA they inherit from their twin parents makes them not only cousins, but genetic brothers.2022 February 24, Michelle Butterfield, Global News
    • The boys — who are not only cousins also genetic siblings known as "quaternary twins" — share the same room and have close relationships with all four adults.2023 May 5, Diane Herbst, People

Forms of quaternary twin

pluralquaternary twins

Questions about quaternary twin

What does quaternary twin mean?
Quaternary twin means first cousins whose parents are a pair of identical twins.
What part of speech is quaternary twin?
Quaternary twin is a noun.
What is the plural of quaternary twin?
The plural of quaternary twin is quaternary twins.

Words near quaternary twin in the dictionary

  1. quaternary sector
  2. quaternary sector of the economy
  3. quaternary sectors of the economy
  4. quaternary structure
  5. quaternary structures
  6. quaternary twin
  7. quaternary twins
  8. quaternate
  9. quaternation
  10. quaternations
  11. quaternion

Source and license

Adapted from Wiktionary: quaternary twin (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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