the fertilization of an ovum by several spermatozoa.
Origin of polyspermy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The entrance of more than one spermatozoon into the ovum.polyspermia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.