英文字典中文字典51ZiDian.com

The Collaborative International Dictionary of English v.0.48 (gcide)

Pronucleus \Pro*nu"cle*us\, n.; pl. {Pronuclei} (-[imac]). [NL.
See {Pro-}, and {Nucleus}.] (Biol.)
One of the two bodies or nuclei (called male and female
pronuclei) which unite to form the first segmentation nucleus
of an impregnated ovum.
[1913 Webster]

Note: In the maturing of the ovum preparatory to
impregnation, a part of the germinal vesicle (see
{Polar body}, under {Polar}) becomes converted into a
number of small vesicles, which aggregate themselves
into a single clear nucleus. which travels towards the
center of the egg and is called the female pronucleus.
In impregnation, the spermatozoon which enters the egg
soon loses its tail, while the head forms a nucleus,
called the male pronucleus, which gradually travels
towards the female pronucleus and eventually fuses with
it, forming the first segmentation nucleus.
[1913 Webster]

请选择你想看的字典辞典：

单词	字典	翻译
Pronucleus	查看　Pronucleus　在百度字典中的解释	百度英翻中〔查看〕
Pronucleus	查看　Pronucleus　在Google字典中的解释	Google英翻中〔查看〕
Pronucleus	查看　Pronucleus　在Yahoo字典中的解释	Yahoo英翻中〔查看〕