Definitions

1. noun

A small rounded mass or lump of tissue, usually hard, in an organ or the body, such as a lymph node or a bone tumor.

“The doctor examined the patient’s chest for any nodule that may be a sign of cancer.”

2. noun

A small rounded mass or growth on a surface, especially a rock or a tree trunk.

“The rock had a small nodule of quartz sticking out of it.”

3. verb

To form or become a nodule, especially on a surface.

“The tree trunk started to nodule with lichen after years of exposure to the elements.”