Word.ws English Dictionary

cotwin

cotwin noun: a twin's twin.

Noun

cotwin (plural cotwins)

  1. A twin's twin.
    • In contrast, if a psychopathologic feature is acquired as a result of an environmental factor unique to the exposed twin, eg, the traumatic event, their cotwins should not have an increased incidence of the feature.2013, Issues in Clinical Psychology, Psychiatry, and Counseling

Forms of cotwin

pluralcotwins
alternative formco-twin

Origin of cotwin

From co- + twin.

Questions about cotwin

What does cotwin mean?
Cotwin means a twin's twin.
What part of speech is cotwin?
Cotwin is a noun.
What is the plural of cotwin?
The plural of cotwin is cotwins.

Words near cotwin in the dictionary

  1. cotutelage
  2. cotutor
  3. cotutors
  4. cotwal
  5. cotwals
  6. cotwin
  7. cotwins
  8. Coty
  9. cotyla
  10. cotylae
  11. cotylai

Source and license

Adapted from Wiktionary: cotwin (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: “cotwin.” Word.ws, https://word.ws/cotwin. Based on Wiktionary, CC BY-SA 4.0.