Look up: Dizygotic Twin

1. Dizygotic twin
   Dizygotic twin: A twins who have shared a common uterine environment with its twin but is due to a different fertilized ovum. Dizygotic twins are also called fraternal twins.
   Found on http://www.medterms.com/script/main/art.
   
   
2. dizygotic twin
   <embryology> Twins which are the result of two separate zygotes, or two separate eggs fertilized by two separate sperm. ... They can be any combination of sexes (two males, two females, one of each). ... Compare: monozygotic twins. ... (09 Oct 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. Dizygotic Twin
   The most common type of multiple pregnancy. Fraternal twins occur when two different eggs are fertilized by different sperm. Because these types of siblings do not share any of the exact genetic material, they will be no more alike than siblings born at separate times. Fraternal siblings can be the same sex or different sexes. Synonym(s): F...
   Found on http://www.pregnology.com/AZ/D/3