dictionary help| polyspermy | medical dictionary |
Penetration of more than one spermatozoon into an ovum at time of fertilization. Occurs as normal event in very yolky eggs (e.g. Bird), but then only one sperm fuses with egg nucleus. Many other eggs have mechanisms to block polyspermy.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
polysorbates, polyspast, polyspermia, polyspermous < Prev | Next > Polysphondylium, polysplenia, polysplenia syndrome
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