zona pellucida
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zona pellucida Definition
(n)
thick
membrane
around
the
mammalian
ovum
;
can
be
penetrated
by
one
sperm
in
the
fertilization
process
;
usually
remains
around
the
fertilized
egg
until
it
is
implanted
in
the
wall
of
the
uterus
zona pellucida Synonyms
zona pellucida
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