Cotwin

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 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."

Example

More examples

"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."

Etymology

From co- + twin.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.