Definitions for "Dizygotic twins"
Twins conceived by the union of two different ova (or a single ovum that has split) with two different sperm cells within a brief period of time; also called fraternal twins.
Twins which were developed from two separate eggs, released from the ovary and fertilized at the same time. They may or may not be of the same sex, differ physically and genetically and have separate placentas, and separate amnionic and chorionic membranes. They are sometimes called binovular twins, dissimilar twins, false twins, fraternal twins or heterologous twins. Twins developed from the same egg, are knowns as monozygotic or identical twins.
Twins formed from two fertilised eggs, or zygotes; non-identical twins.