Meaning of quaternary twin | Babel Free

Definitions

First cousins whose parents are a pair of identical twins.

Examples

“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.”

“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.”

“Quaternary twins occur when one set of identical twins has children with another set of identical twins.”

CEFR level