noun / adjective / verb
twin
TWIN/twɪn/
One of two offspring born together.
The mother cradles one newborn twin in each arm.

Etymology
Old English getwinn meant “double,” and its plural named two born at one birth. The singular noun identifies one member of that birth-pair, rather than the pair as a whole.
In context
a single fertilized egg splits in the womb creating two genetically identical people but despite how little we know about them twins have a lot to reveal about us twin studies Give us new ways of understanding human behavioral phenomena
More examples
- My twin sister and I have very different personalities.
- The sheep gives birth to twins in the spring.
- Fraternal twins can be a boy and a girl.
Forms
twin · twins
Similar words
- sibling
- Any brother or sister, not necessarily from the same pregnancy.