nodule

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nodule:

see concretionconcretion,
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 nucleus.
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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.

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
References in periodicals archive ?
The estimates of net inputs of legume N associated with the vegetative residues and nodulated roots at the end of the growing season were in the range of 52-330 kg N/ha for crops grown for grain and 210-323 kg N/ha for BM legumes (Table 2).
Nodule number (no nod) and nodule weight (NW); shoot dry weight (SDW); total nitrogen in the shoot or grain (N total); N derived from atmosphere (Ndfa) and grain dry weight (GDW) measured in non-nodulating and nodulated cultivars of common beans, Apore and Ouro Negro Cultivar Non-nodulating (a) Nodules no nod 0 * NW (g [plant.
The relationship between dry matter yield and total nitrogen were highly correlating in effectively nodulated plants.
All plant varieties nodulated on this soil type except Groundnut ALR1.
Since most of these plants are not nodulated the associated NA is attributed to diazotrophic microbes located in the rhizosphere of the root either on the rhizoplane, in the adherent soil, or endophytic in the root tissues.
R69 was sparsely nodulated with tiny pale white nodules which appeared to be nonfunctional (ineffective) in [N.
Accumulation of [gamma]-aminobutyric acid in nodulated soybean in response to drought stress.
While neurofibromas can develop anywhere, NF-1 is considered the "peripheral" disease that is characterized by many small nodulated tumors that occur prominently on the trunk and along the brachial plexi.
Structurally a T8 transverse process that is nodulated and tender to palpation, combined with tenderness along the lower right rib tips (anterior), symptoms of headache and lassitude, a medial right scapula that is painful to palpation, signs of burning feet, wandering pain, irritability or anger, and right sides of tongue signs (TOM) strongly suggest liver functional problems or even organic disease.
After 12 weeks, the poorly nodulated seedlings looked small and stunted compared to plants having the benefit of elite inoculation.
In the summer of 2000, we excavated multiple yellow sweetclover plants from naturalized stands in the native prairie of each of six eastern Montana counties and found all plants to be nodulated to some degree.