[ in-too-mes-uh ns, -tyoo- ]
/ ˌɪn tʊˈmɛs əns, -tyʊ- /


a swelling up, as with congestion.
the state of being swollen.
a swollen mass.

Origin of intumescence

From French, dating back to 1650–60; see origin at intumesce, -ence
Related formsin·tu·mes·cent, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for intumescent



/ (ˌɪntjʊˈmɛsəns) /


pathol a swelling up, as with blood or other fluid
pathol a swollen organ or part
chem the swelling of certain substances on heating, often accompanied by the escape of water vapour
Derived Formsintumescent, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for intumescent


[ ĭn′tōō-mĕsəns ]


The act or process of swelling or the condition of being swollen.
A swollen organ or body part.
Related formsin′tu•mescent adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.