Main Entry:

¹twin

Pronunciation:

\ˈtwin\

Function:

noun

Etymology:

Middle English, from twin twofold

Date:

14th century

1 a: either of two offspring produced at a birth bplural capitalized : gemini2: one of two persons or things closely related to or resembling each other3: a compound crystal composed of two adjoining crystals or parts of crystals of the same kind that share a common plane of atoms

— twin·ship \-ˌship\ noun