One twin, the 'donor' twin, is small and anemic, the other, the 'recipient' twin, is large and polycythemic. The lives of both twins are endangered by this condition.

The meaning of TWIN is either of two offspring produced in the same pregnancy. How to use twin in a sentence.

There are different types of twins, identical and fraternal being the most common. Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are...

Oct 8, 2025 · Twin, either of two young who are simultaneously born from one mother. Twinning, common in many animals, is of two biological kinds: the one-egg (monozygotic), or identical, …

TWIN definition: 1. either of two children born to the same mother on the same occasion: 2. one of two very similar…. Learn more.

Nov 18, 2025 · twin (third-person singular simple present twins, present participle twinning, simple past and past participle twinned) (transitive, obsolete outside Scotland) To separate, divide.

1. Being two or one of two offspring born at the same birth: twin sisters. 2. Being two or one of two identical or similar people, animals, or things: twin cities; a twin bed. 3. Botany Of or relating to …

Definition of twin noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Mar 15, 2023 · We talked with Ob/Gyn Julian Peskin, MD (who is a twin himself), about common types of twins, rare types of twins and everything else you’ve been wondering about twinning.

either of two persons or things closely resembling each other. adj. [before a noun] being a twin or twins: twin sisters. being two persons or things closely related to each other. being one of a …