nodule Meaning, Definition & Usage

  1. noun a small node
  2. noun small rounded wartlike protuberance on a plant
    tubercle.
  3. noun (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment)

WordNet

Nod"ule noun
Etymology
L. nodulus, dim. of nodus knot: cf. F. nodule.
Definitions
  1. A rounded mass or irregular shape; a little knot or lump.

Webster 1913