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EGGS |
Ova |
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OVIPARITY |
Generation by means of ova. See Generation. |
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BERRY |
One of the ova or eggs of a fish. |
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OOGENESIS |
The development, or mode of origin, of the ova. |
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OVISAC |
A Graafian follicle; any sac containing an ovum or ova. |
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AMPHIBLASTIC |
Segmenting unequally; -- said of telolecithal ova
with complete segmentation. |
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SPAWN |
The ova, or eggs, of fishes, oysters, and other aquatic
animals. |
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GERMARIUM |
An organ in which the ova are developed in certain
Turbellaria. |
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OVOTESTTIS |
An organ which produces both ova and spermatozoids; an
hermaphrodite gland. |
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COLLETERIUM |
An organ of female insects, containing a cement to
unite the ejected ova. |
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SUPERFECUNDATION |
Fertilization of two ova, at the same
menstruation, by two different acts of coition. |
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OVARY |
The essential female reproductive organ in which the ova are
produced. See Illust. of Discophora. |
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MEROISTIC |
Applied to the ovaries of insects when they secrete
vitelligenous cells, as well as ova. |
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ECTOMERE |
The more transparent cells, which finally become
external, in many segmenting ova, as those of mammals. |
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ENTOMERE |
The more granular cells, which finally become internal,
in many segmenting ova, as those of mammals. |
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GERMOGEN |
A polynuclear mass of protoplasm, not divided into
separate cells, from which certain ova are developed. |
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PANOISTIC |
Producing ova only; -- said of the ovaries of certain
insects which do not produce vitelligenous cells. |
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OOECIUM |
One of the special zooids, or cells, of Bryozoa, destined
to receive and develop ova; an ovicell. See Bryozoa. |
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ALECITHAL |
Applied to those ova which segment uniformly, and which
have little or no food yelk embedded in their protoplasm. |
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OOTYPE |
The part of the oviduct of certain trematode worms in which
the ova are completed and furnished with a shell. |
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FEMALE |
Belonging to the sex which conceives and gives birth to
young, or (in a wider sense) which produces ova; not male. |
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DIGENESIS |
The faculty of multiplying in two ways; -- by ova
fecundated by spermatic fluid, and asexually, as by buds. See
Parthenogenesis. |
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CHORION |
The outer membrane which invests the fetus in the womb;
also, the similar membrane investing many ova at certain stages of
development. |
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OVULATION |
The formation of ova or eggs in the ovary, and the
discharge of the same. In the mammalian female the discharge occurs
during menstruation. |
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OVICELL |
One of the dilatations of the body wall of Bryozoa in
which the ova sometimes undegro the first stages of their development.
See Illust. of Chilostoma. |