Siamese twin

noun

Meaning

A conjoined twin; one of two people physically joined together.
Either of a pair of words that occur together as an idiomatic expression or collocation, as in "hammer and sickle", "short and sweet", or "spick and span".
One of two people who are extraordinarily close, or always found together.

Etymology / origin

Chang and Eng Bunker, conjoined twins from Siam (modern Thailand), were known as the "Siamese twins".

Sources

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