Pyotr Ilyich Tchaikovsky (1840-1893) Most famous Russian classical music composer wrote in a variety of genres. He composed symphonies, operas, concertos, chamber music, sacred choral music, overtures, suites and ballets.
Medical Definition of 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. Last Editorial Review: 6/9/2016.
The explanation for dizygotic twinning lies in the cause of hyperovulation, or the release of more than one egg in a cycle of ovulation. There are numerous reasons for hyperovulation, and any one or combination of factors can be attributed as the cause for fraternal twins. Hormones control the process of ovulation. Usually, they signal the body to release one egg in a cycle. But sometimes they trigger the release of two or more eggs.