n, pl  -thro*ses   1  :  a red or purplish color of the skin (as of the face) resulting from vascular congestion (as in polycythemia)  :  PLETHORA  2  :  a hyperplastic condition of tissues that form red blood cells .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2026.