Definitions for identical twin
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Random House Webster's College Dictionary
iden′tical twin′(n.)
either of a pair of twins who develop from a single fertilized ovum and therefore have the same genotype, are of the same sex, and usu. resemble each other closely.
Category: Developmental Biology
Ref: Compare fraternal twin.
Princeton's WordNet
identical twin, monozygotic twin, monozygous twin(noun)
either of two twins developed from the same fertilized ovum (having the same genetic material)
Wiktionary
identical twin(Noun)
One of two siblings produced from the splitting of a single zygote.
Origin: identical + twin
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