Definition
noun
The fertilization of an ovum by more than one sperm.
Supplement
The ovum fertilized by more than one sperm results in having more than two copies of each chromosome — one from the ovum and one each from the sperms. The resulting zygote is often inviable.
Word origin: from polyspermia » Gk polyspermía abundance of seed + –y.
Related forms: polyspermic (adjective)
Compare: monospermy.
See also: fertilization.
Dictionary > Polyspermy
You will also like...
![Growth Patterns](https://www.biologyonline.com/wp-content/uploads/2020/02/Growth-Patterns-252x168.jpg)
Growth Patterns
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
![Young plant growing from the soil.](https://www.biologyonline.com/wp-content/uploads/2020/02/Soils-257x168.jpg)
Soils
Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..
![takahē](https://www.biologyonline.com/wp-content/uploads/2020/09/takahe-300x168.jpg)
Takahē (Porphyrio hochstetteri)
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..
![Neurology of Illusions](https://www.biologyonline.com/wp-content/uploads/2020/02/Neurology-of-Illusions-226x168.jpg)
Neurology of Illusions
Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..
![Ploidy](https://www.biologyonline.com/wp-content/uploads/2020/02/Mutation-Frequency-and-Polyploidy-214x168.jpg)
Polyploidy
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
![Plant meristem](https://www.biologyonline.com/wp-content/uploads/2020/02/Plant-Meristems-and-Growth-253x168.jpg)
Plant Meristems and Growth
In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..