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  1. Twin - Wikipedia

    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.

  2. Twin | Identical, Monozygotic, Dizygotic | Britannica

    6 days ago · 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, …

  3. TWIN Definition & Meaning - Merriam-Webster

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

  4. TWIN Definition & Meaning | Dictionary.com

    TWIN definition: either of two children or animals brought forth at a birth. See examples of twin used in a sentence.

  5. Understanding Twins - Psychology Today

    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...

  6. TWIN | definition in the Cambridge English Dictionary

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

  7. TWIN definition and meaning | Collins English Dictionary

    Twin is used to describe a pair of things that look the same and are close together. ...the twin spires of the cathedral. ...the world's largest twin-engined aircraft.

  8. Twin - definition of twin by The Free Dictionary

    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 …

  9. World Trade Center History - National September 11 Memorial & Museum

    Feb 26, 1993 · The stories below offer a glimpse into the day-to-day operations of the World Trade Center complex, the activities and events that took place on the site, and the people …

  10. twin - WordReference.com Dictionary of English

    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 …