Nodule definition

nŏjo͝ol
Frequency:
(mineralogy) A small rounded lump of a mineral or mixture of minerals, usually harder than the surrounding rock or sediment.
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A small knot or irregular, rounded lump.
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(anat.) A small node.
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(bot.) A small knot or joint on a stem or root, esp. one containing nitrogen-fixing bacteria.
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A small, hard lump or mass of a mineral or rock that is embedded in a larger rock.
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A usually small, roundish lump or mass of manganese, cobalt, etc. found on the floor of the sea or a large lake.
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A small knotlike protuberance.
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(medicine) A small, abnormal but usually benign mass of tissue, as on the thyroid gland, in the lung, or under the skin.
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(botany) A small knoblike outgrowth, especially one on the roots of a leguminous plant that contains bacteria that fix nitrogen.
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A small, usually hard mass of tissue in the body.
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A small, knoblike outgrowth found on the roots of many legumes, such as alfalfa, beans, and peas. Nodules grow after the roots have been infected with nitrogen-fixing bacteria of the genus Rhizobium.
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A small, rounded lump of a mineral or mixture of minerals that is distinct from and usually harder than the surrounding rock or sediment. Nodules often form by replacement of a small part of the rocks in which they form.
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A rounded mass or irregular shape; a little knot or lump.
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A small knotlike protuberance.
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(medicine) A small, abnormal but usually benign mass of tissue, as on the thyroid gland, in the lung, or under the skin.
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(botany) A small knoblike outgrowth, especially one on the roots of a leguminous plant that contains bacteria that fix nitrogen.
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Other Word Forms

Noun

Singular:
nodule
Plural:
nodules

Origin of nodule

  • Middle English from Latin nōdulus diminutive of nōdus knot ned- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin nodulus (“small knot")

    From Wiktionary