one of a pair of twins who develop from a single fertilized ovum and therefore have the same genotype, are of the same sex, and usually resemble each other closely.
Wonder TwinsRead more in this article about some frequently asked questions and fun facts related to our definitions.
What Are Some Words For Sibling Pairs?These days, giving birth to twins is increasingly common. As many as 5 out of every 1,000 babies born shared a womb with their sibling. While cute and adorable are some starter words to use when welcoming new babies, here's a look at the lexicon to haul out when welcoming multiples!
Compare fraternal twin.
Origin of identical twin
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019