| sperm transport | Passive transport or active migration of spermatozoa from the testes through the male genital system as well as within the female genital system. (12 Dec 1998) |
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| sperm whale | <zoology> A very large toothed whale (Physeter macrocephalus), having a head of enormous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case, filled with oil and spermaceti. This whale sometimes grows to the length of more than eighty feet. It is found in the warmer parts of all the oceans. Called also cachalot, and spermaceti whale. Pygmy sperm whale, a toothed cetacean (Hyperoodon bidens), found on both sides of the Atlantic and valued for its oil. The adult becomes about twenty-five feet long, and its head is very large and thick. Called also bottle-nosed whale. Source: Websters Dictionary (01 Mar 1998) |
| sperm-aster | Cytocentrum with astral rays in the cytoplasm of an inseminated ovum; it is brought in by the penetrating spermatozoon and evolves into the mitotic spindle of the first cleavage division. Origin: sperm + G. Aster, a star (aster) (05 Mar 2000) |
| sperm-ovum interactions | Interactive processes between the ovum and the spermatozoon. (12 Dec 1998) |
| spermaceti | A white waxy substance obtained from cavities in the head of the sperm whale, and used making candles, oilments, cosmetics, etc. It consists essentially of ethereal salts of palmitic acid with ethal and other hydrocarbon bases. The substance of spermaceti after the removal of certain impurities is sometimes called cetin. <zoology> Spermaceti whale, the sperm whale. Origin: L. Sperma sperm + cetus,gen. Ceti, any large sea animal, a whale, Gr. See Sperm, Cetaceous. Source: Websters Dictionary (01 Mar 1998) |
| spermacytic seminoma | <tumour> A relatively slow-growing, locally invasive type of testicular seminoma that does not metastasize and has no ovarian counterpart. (05 Mar 2000) |
| spermagglutination | Agglutination of spermatozoa. (05 Mar 2000) Previous: Spens, Thomas, spent, speract, sperling, sperm, spermaceti, spermacytic seminomaNext: sperm agglutination, spermalist, spermaphore, spermary, sperm-astersperm agglutination Agglutination of spermatozoa by antibodies or autoantibodies. (12 Dec 1998) |
| spermalist | <biology> See Spermist. Source: Websters Dictionary (01 Mar 1998) |
| spermaphore | <botany> That part of the ovary from which the ovules arise; the placenta. Origin: Gr. Sperm + to bear. Source: Websters Dictionary (01 Mar 1998) |
| spermary | <anatomy> An organ in which spermatozoa are developed; a sperm gland; a testicle. Source: Websters Dictionary (01 Mar 1998) |
| spermatheca | Origin: NL, from Gr. Seed + case, or receptacle. <zoology> A small sac connected with the female reproductive organs of insects and many other invertebrates, serving to receive and retain the spermatozoa. Source: Websters Dictionary (01 Mar 1998) |
| spermatic | <physiology> Of or pertaining to semen; as, the spermatic fluid, the spermatic vessels, etc. <anatomy> Spermatic cord, the cord which suspends the testicle within the scrotum. It is made up of a connective tissue sheath inclosing the spermatic duct and accompanying vessels and nerves. Origin: L. Spermaticus, Gr., cf. F. Spermatique. See Sperm. Source: Websters Dictionary (01 Mar 1998) |
| spermatic cord | A group of structures which go through the inguinal canal to the testis. The structures include the vas deferens, arteries, veins, lymphatic vessels, and nerves. (12 Dec 1998) |
| spermatic cord torsion | Torsion of the spermatic cord caused usually by incomplete attachment of the epididymis to the testis or by inclusion of the cord within the tunica vaginalis. Faulty development of various anatomical components of the testes is also a cause. It occurs most frequently in childhood and adolescence. (12 Dec 1998) |
| spermatic duct | The secretory duct of the testicle, running from the epididymis, of which it is the continuation, to the prostatic urethra where it terminates as the ejaculatory duct. Synonym: deferent canal, deferent duct, spermatic duct, spermiduct, testicular duct, vas deferens. (05 Mar 2000) |