| 单词 | nodule |
| 释义 | nodule [`näj·ül] ANATOMY 1. A small node. 2. A small aggregation of cells. BOTANY A bulbous enlargement found on roots of legumes and certain other plants, whose formation is stimulated by symbiotic, nitrogen- fixing bacteria that colonize the roots. GEOLOGY A small, hard mass or lump of a mineral or mineral aggregate characterized by a contrasting composition from and a greater hardness than the surrounding sediment or rock matrix in which it is embedded. MEDICINE A primary skin lesion, seen as a circumscribed solid elevation. |
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