| Aran, Francois | <person> French physician, 1817-1861. See: Aran-Duchenne disease, Duchenne-Aran disease. (05 Mar 2000) |
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| Aran-Duchenne disease | A serious neurologic disease that results from the progressive degeneration of the motor neurons. (27 Sep 1997) |
| araneidan | <zoology> Of or pertaining to the Araneina or spiders. One of the Araneina; a spider. Source: Websters Dictionary (01 Mar 1998) |
| araneiform | <zoology> Having the form of a spider. Origin: L. Aranea spider. Source: Websters Dictionary (01 Mar 1998) |
| araneina | <zoology> The order of Arachnida that includes the spiders. They have mandibles, modified a poison fags, leglike palpi, simple eyes, abdomen without segments, and spinnerets for spinning a web. They breathe by pulmonary sacs and tracheae in the abdomen. Origin: NL, fr. L. Aranea spider. Source: Websters Dictionary (01 Mar 1998) |
| araneism | Rarely used term for arachnidism. (05 Mar 2000) |
| araneoidea | <zoology> See Araneina. Source: Websters Dictionary (01 Mar 1998) |
| Arantius' ligament | A thin fibrous cord, lying in the fissure of the ligamentum venosum, the remains of the ductus venosus of the foetus. Synonym: Arantius' ligament, ligamentum ductus venosi, venous ligament. (05 Mar 2000) |
| Arantius' nodule | A nodule at the centre of the free border of each semilunar valve at the beginning of the pulmonary artery and aorta. Synonym: nodulus valvulae semilunaris, Arantius' nodule, Bianchi's nodule, corpus arantii, Morgagni's nodule. (05 Mar 2000) |
| Arantius' ventricle | Inferior part of the rhomboid fossa; the narrow lower end of the fourth ventricle between the two clavae. Synonym: Arantius' ventricle. Origin: L. Writing pen (05 Mar 2000) |
| Arantius, Giulio | <person> Italian anatomist and physician, 1530-1589. See: Arantius' ligament, Arantius' nodule, Arantius' ventricle, corpus arantii, ductus venosus arantii. (05 Mar 2000) |
| Duchenne-Aran disease | A serious neurologic disease that results from the progressive degeneration of the motor neurons. (27 Sep 1997) |
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