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nodule |
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nodule: see concretion concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the pore spaces of the sediment, usually around a fossil or fossil fragment acting as a ..... Click the link for more information. . noduleIn geology, a rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules usually are elongated and have a knobby irregular surface; they are generally oriented parallel to the bedding. Chert and flint, clay ironstone, and phosphorites commonly occur as nodules. Manganese-rich nodules are found on the ocean floor. nodule 1. any of the knoblike outgrowths on the roots of clover and many other legumes: contain bacteria involved in nitrogen fixation 2. Anatomy any small node or knoblike protuberance 3. a small rounded lump of rock or mineral substance, esp in a matrix of different rock material nodule [′näj·ül] (anatomy) A small node. 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| He and Dunsford had worked at the subject together on Philip's skeleton, asking each other questions till both knew by heart every attachment and the meaning of every nodule and groove on the human bones; but in the examination room Philip was seized with panic, and failed to give right answers to questions from a sudden fear that they might be wrong. Of him her brother thus wrote, speaking of visiting his plantation, on a collecting tour; "He actually made me feel of his fist, which was like a blacksmith's hammer, or a nodule of iron, telling me that it was He fingered the pouch, feeling out the shapes and sizes of the precious, little nodules within. |
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