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testis

(Encyclopedia)testis tĕsˈtĭkəl [key], one of a pair of glands that produce the male reproductive cells, or sperm. In fetal life the testes develop in the abdomen, then descend into an external sac, the scrotum....

harpoon

(Encyclopedia)harpoon härpo͞onˈ [key], weapon used for spearing whales and large fish. The early type was a flat triangular piece of metal with barbed edges and a socket for attaching a wooden handle, to the end...

artificial insemination

(Encyclopedia)artificial insemination, technique involving the artificial injection of sperm-containing semen from a male into a female to cause pregnancy. Artificial insemination is often used in animals to multip...

reproductive system

(Encyclopedia) CE5 Reproductive system reproductive system, in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the femal...

leviathan

(Encyclopedia)leviathan lēvīˈəthən [key], in the Bible, aquatic monster, presumably the crocodile, the whale, or a dragon. It was a symbol of evil to be ultimately defeated by the power of good. ...

meiosis

(Encyclopedia) CE5 Formation of sperm cells through meiosis meiosis mīŏˈsĭs [key], process of nuclear division in a living cell by which the number of chromosomes is reduced to half the original number. Meio...

in vitro fertilization

(Encyclopedia)in vitro fertilization vēˈtrō, vĭˈtrō [key] (IVF), technique for conception of a human embryo outside the mother's body. Several ova, or eggs, are removed from the mother's body and placed in sp...

grampus

(Encyclopedia)grampus, name applied to two members of the dolphin family (Delphinidae): Grampus griseus, also known as Risso's dolphin, of worldwide distribution, and Orcinus orca, also known as the killer whale. ...

surrogate mother

(Encyclopedia)surrogate mother, a woman who agrees, usually by contract and for a fee, to bear a child for a couple who are childless because the wife is infertile or physically incapable of carrying a developing f...
 

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