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nodule

nodule

1 7.7
A small round lump of mineral that forms in rock or mud
  • noun
  • /ˈnɒdʒuːl/
  • Specialized
translation icon : nódulo
  • Like Namsifueli's wine jar, it was decorated with incised dots and a ring of nodules around its belly.
  • chert nodule
  • polymetallic nodules
  • manganese nodules

Examples

  • Lifting another large piece of basalt, she brings it down onto the nodule several times, striking off many pieces.

    Academic text (2002)
  • After almost an hour, Sokate picks up a small nodule of chert.

    Academic text (2002)
  • Excavations showed ridges built predominantly of chert nodules and clasts.

    Academic text (2002)
  • The rocks were coal black, like magnesium nodules, but these had jagged edges, like congealed shards of glass.

    Fiction book (2000)
  • Rheumatoid arthritis is a multi-system disease. One of the most common extra-articular manifestations of RA is the rheumatoid nodule.

    Academic text (2007)
  • A glassy nodule entrained in alkali basalt, Kula, Turkey (previously described by Holness et al. 2005).

    Academic text (2018)
  • The furious waves would pound road, rock, walls, and roof to nothing, leaving only the indestructible nodules of gray flint, strewn on the beach to be used as the waves' ammunition for the next attack against the cliff.

    Fiction book (1999)
  • The scientist discovered a small nodule of coal embedded in the sedimentary rock.

  • Geologists studied the nodule formed from a mixture of minerals found during their excavation.

  • After inspecting the soil sample, they noted several nodules of iron ore among the gravel.

Synonyms

bump
vsnodule
118 2.5

A raised swelling on the body after a hit

is formed naturally inside rock rather than caused by an external impact
lump
vsnodule
77 2.0

A small solid piece of something without a regular shape

is a small rounded hardened mineral mass typically found in rock formations

Surface Forms

nodule singular
nodules plural

Morphology

nodule = node (semi-transparent) = nodul + ule

Same formation as in sense 1: a diminutive/derived form related to 'node' giving 'small lump', but the suffix is a learned Latin diminutive not widely productive.

Etymology

The word nodule comes from the Latin nodus meaning 'knot', with nodulus meaning a small knot. So a nodule is like a little knot or hard round lump inside rock or sediment, which is why geologists call mineral lumps 'nodules'.