Definition of polyspermy in US English:

polyspermy

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, after German Polyspermie. Compare French polyspermie.

Pronunciation

polyspermy

/ˈpɒlɪspəːmi/