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.

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, …

Apr 28, 2025 · Identical twins, also known as monozygotic twins, share the same egg at conception and are always either both boys or both girls. Fraternal twins, also known as …

Mar 15, 2023 · Fraternal and identical are the most common types of twins. Other types include conjoined twins, half-identical twins and others.

1 day ago · twin (plural twins) Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling. synonyms …

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

The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health, as well as traits …

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 …

Sep 23, 2024 · Do twins run in families? Find out what you need to know about how hereditary twins are.