| root nodule | <plant biology> Globular structure formed on the roots of certain plants, notably legumes and alder, by symbiotic association between the plant and a nitrogen fixing microorganism (Rhizobium in the case of legumes and Frankia in the case of alder and a variety of other plants). (18 Nov 1997) |
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| milker's nodule virus | A virus in the family Poxviridae. (05 Mar 2000) |
| cold nodule | A thyroid nodule with a much lower uptake of radioactive iodine than the surrounding parenchyma; about one in four prove to be malignant. (05 Mar 2000) |
| cold thyroid nodule | <radiology> Adenoma (75%), colloid cyst (10%), carcinoma (15%), mnemonic: CATCH PALLM colloid cyst, adenoma, thyroiditis, carcinoma, haematoma, parathyroid adenoma, abscess, lymph node, lymphoma, metastasis thyroid carcinoma, hot thyroid nodule (12 Dec 1998) |
| Morgagni's 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) |
| primary nodule | A lymphatic nodule having small lymphocytes and lacking a germinal centre. (05 Mar 2000) |
| Sakurai-Lisch nodule | Iris hamartomas typically seen in type 1 neurofibromatosis. Synonym: Sakurai-Lisch nodule. (05 Mar 2000) |
| Schmorl's nodule | Prolapse of the nucleus pulposus through the vertebral body endplate into the spongiosa of the vertebra. (05 Mar 2000) |
| secondary nodule | A lymphatic nodule having a germinal centre. (05 Mar 2000) |
| pulp nodule | A calcified body found in the pulp chamber of a tooth; may be composed of irregular dentin (true denticle) or due to ectopic calcification of pulp tissue (false denticle). Synonym: denticle, pulp calcification, pulp calculus, pulp nodule, pulp stone. Origin: endo-+ G. Lithos, stone (05 Mar 2000) |
| hot nodule | A thyroid nodule with a much higher uptake of radioactive iodine than the surrounding parenchyma; usually benign but sometimes causing hyperthyroidism. (05 Mar 2000) |
| hot thyroid nodule | <radiology> Almost always hyperfunctioning adenoma, vast majority benign, up to 50% are autonomous see also: thyroid carcinoma, cold thyroid nodule (12 Dec 1998) |
| Sister Joseph's nodule | A malignant intra-abdominal neoplasm metastatic to the umbilicus. (05 Mar 2000) |
| nodule | A small lump, swelling or collection of tissue. (27 Sep 1997) |
| nodule of semilunar valve | 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) |