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| sperm oil |
a lubricating oil that is obtained from sperm whales. |
| sperm whale |
a large, toothed whale with a huge, squarish head from which sperm oil and spermaceti are obtained. |
| testosterone |
a steroid hormone produced in the testes that is responsible for stimulating the development of male sex organs, secondary sex characteristics, and sperm. |
| toothed whale |
any of various whales, such as the sperm whale, that have conical teeth in either or both jaws and a foreshortened, asymmetrical skull. (Cf. whalebone whale.) |
| vas deferens |
the duct that carries sperm from the testicle to the ejaculatory duct of the penis. |
| vasectomy |
a surgical operation in which a male's sperm-carrying tube is cut and tied or removed, as a means of birth control. |
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