identical twin
US /aɪˌden.tɪ.kəl ˈtwɪn/
UK /aɪˌden.tɪ.kəl ˈtwɪn/
1.
однояйцевый близнец
either of two fetuses or children born at the same birth who have developed from the same ovum and are therefore always of the same sex and usually very similar in appearance
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My cousins are identical twins; it's hard to tell them apart.
Мои двоюродные братья — однояйцевые близнецы; их трудно различить.
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She gave birth to a pair of healthy identical twins.
Она родила пару здоровых однояйцевых близнецов.