WordReference Random House Unabridged Dictionary of American English © 2025
iden′tical twin′,
- Developmental Biologyone 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. Cf. fraternal twin.
- 1885–90
'identical twin' also found in these entries (note: many are not synonyms or translations):