| nematospermia | Spermatozoa with an elongated tail, as in humans, in contrast to spherospermia. Origin: nemat-+ G. Sperma, seed (05 Mar 2000) |
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| nematospiroides | A genus of nematodes found mainly in mice. Its organisms are used in biomedical research. (12 Dec 1998) |
| nematospiroides dubius | A species of intestinal nematode parasites which occur most commonly in mice. Infection is by ingesting larvae. This particular species is used extensively in immunological research. (12 Dec 1998) |