单词 | nodule |
释义 | nod·ule ![]() n. 1. A small knotlike protuberance. 2. Medicine A small, abnormal but usually benign mass of tissue, as on the thyroid gland, in the lung, or under the skin. 3. Botany A small knoblike outgrowth, especially one on the roots of a leguminous plant that contains bacteria that fix nitrogen. 4. Mineralogy A small rounded lump of a mineral or mixture of minerals, usually harder than the surrounding rock or sediment. [Middle English, from Latin nōdulus, diminutive of nōdus, knot; see ned- in the Appendix of Indo-European roots.] nodu·lar (nŏjə-lər), nodu·lose′ (-lōs′), nodu·lous (-ləs) adj. |
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