Definition
noun
The fertilization of an ovum by only one sperm.
Supplement
The ovum when fertilized by a sperm forms a fertilization membrane to prevent penetration of other sperms.
Word origin: Greek, mónos, alone + Greek –spermos, from sperma, seed + –y.
Related forms: polyspermic (adjective).
Compare: polyspermy.
See also: fertilization.
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