n :  a small mass of rounded or irregular shape: as  a  :  a small abnormal knobby bodily protuberance (as a tumorous growth or a calcification near an arthritic joint)  b  :  the nodulus of the cerebellum .
 
 
 
Similar sounding terms:  na·tal   needle  net·tle  ni·dal 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2004.