Nodule
Encyclopedia
Nodule may refer to:
- Nodule (geology)Nodule (geology)A nodule in petrology or mineralogy is a secondary structure, generally spherical or irregularly rounded in shape. Nodules are typically solid replacement bodies of chert or iron oxides formed during diagenesis of a sedimentary rock...
, a small knobbly rock or mineral cluster, such as a manganese nodule - Nodule (medicine)Nodule (medicine)For use of the term nodule in dermatology, see Nodule In medicine, a nodule refers to a relatively hard, roughly spherical abnormal structure....
, a small aggregation of cells - Nodule (dermatology), a lesion similar to a papule
- Root noduleRoot noduleRoot nodules occur on the roots of plants that associate with symbiotic nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia...
, an outgrowth formed on the roots of legumes that house symbiotic bacteria that fix atmospheric nitrogen and provide it to the plant in exchange for carbon - A feature of mollusc sculptureSculpture (mollusc)The sculpture of a mollusc shell is the three-dimensional ornamentation on the outer surface, as distinct from the basic shape of the shell itself or colouration. Sculpture may be concave as well as convex. Sometimes it has microscopic detail. Sculpture refers to the calcareous outer layer, not the...
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