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[in-doo-rey-shuh n, -dyoo-] /ˌɪn dʊˈreɪ ʃən, -dyʊ-/
the act of indurating.
the state of being indurated.
  1. lithification.
  2. hardening of rock by heat or pressure.
  1. a hardening of an area of the body as a reaction to inflammation, hyperemia, or neoplastic infiltration.
  2. an area or part of the body that has undergone such a reaction.
1350-1400; Middle English < Late Latin indūrātiōn- (stem of indūrātiō) a hardening. See indurate, -ion
Related forms
indurative, adjective
nonindurative, adjective
unindurative, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Contemporary definitions for in-durative
noun's 21st Century Lexicon
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Word Origin and History for in-durative



late 14c., from Old French induracion "hardness, obstinacy" (14c.) or directly from Medieval Latin indurationem (nominative induratio) "hardness (especially of the heart)," noun of action from indurare (see endure).

Online Etymology Dictionary, © 2010 Douglas Harper
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in-durative in Medicine

induration in·du·ra·tion (ĭn'də-rā'shən, -dyə-)

  1. The hardening of a normally soft tissue or organ, especially the skin, because of inflammation, infiltration of a neoplasm, or an accumulation of blood.

  2. A focus or region of abnormally hardened tissue.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for in-durative


hardening of rocks by heat or baking; also the hardening of sediments through cementation or compaction, or both, without the introduction of heat. The classic example is the rock called hornfels, which is formed at contacts with igneous intrusions and in which heat and fluids from the intruding magma reconstitute the original wall rock into a hardened, flinty rock with a dense texture; it also is commonly formed by induration of carbonate sedimentary rocks and shales.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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