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Origin of twin

1
First recorded before 900; Middle English adjective twynne, twinne, Old English adjective twinn “twofold, double”; noun and adjective getwinn “double,” (plural getwinnas “twins”); akin to Old Frisian twīna, twīne “two together,” Old Norse tvinnr “double,” Gothic twaihnái “two each”

WORDS THAT MAY BE CONFUSED WITH twin

twain, twin , twine

Other definitions for twin (2 of 2)

twin2
[ twin ]
/ twɪn /

verb (used with or without object), twinned, twin·ning.Scot.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use twin in a sentence

British Dictionary definitions for twin

twin
/ (twɪn) /

noun
verb twins, twinning or twinned

Derived forms of twin

twinning, noun

Word Origin for twin

Old English twinn; related to Old High German zwiniling twin, Old Norse tvinnr double
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for twin

twin
[ twĭn ]

n.
One of two offspring born at the same birth.
adj.
Being two or one of two offspring born at the same birth.
Consisting of two identical or similar parts; double.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for twin

twin
[ twĭn ]

One of two offspring born of a single gestation. Identical twins result from the division of a fertilized egg. Fraternal twins result from the fertilization of two separate eggs at the same time.
A crystal structure consisting of two intergrown crystals that are mirror images of each other. Mineral twins can form as result of defective crystal growth in response to stress from rock deformation or during magma cooling.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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