Definition of polyspermy in English:

polyspermy

Pronunciation /ˈpɒlɪspəːmi/

noun

Biology
  • Penetration of an ovum by more than one sperm.

Origin

Late 19th century; earliest use found in American Naturalist. From Byzantine Greek πολυσπερμία abundance of seed (from ancient Greek πολύσπερμος abounding in seed + -ία), after German Polyspermie.