Ulcerate Definition
 ŭlsə-rāt 
  ulcerated, ulcerates, ulcerating
  
    verb
  
 To make or become ulcerous.
 Webster's New World 
To cause ulceration of.
 American Heritage 
    adjective
  
 (palynology, of a pollen grain) Having an ulcus, a rounded pore-like aperture, at one or both poles.
Wiktionary 
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