er·y·the·ma
  (ĕr′ə-thē′mə)n. Redness of the skin caused by dilatation and congestion of the capillaries, often a sign of inflammation or infection.
 
er′y·them′a·tous (-thĕm′ə-təs, -thē′mə-), er′y·the·mat′ic (-măt′ĭk), er′y·the′mic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
erythema
 (ˌɛrɪˈθiːmə) n (Pathology) pathol redness of the skin, usually occurring in patches, caused by irritation or injury to the tissue
 [C18: from New Latin, from Greek eruthēma, from eruthros red]
 erythematic, erythematous, ˌeryˈthemal adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
er•y•the•ma
  (ˌɛr əˈθi mə)  
 
 n.   abnormal redness of the skin due to local congestion, as in inflammation. 
 [1760–70; < New Latin < Greek, =eryth(rós) red + -ēma n. suffix]
  er`y•them′a•tous  (-ˈθɛm ə təs, -ˈθi mə-)  er`y•the′mic, adj.  
 Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
erythema
an abnormal red condition of the skin, the result of capillary congestion.  — erythematous, adj.
See also: Disease and Illness-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.