rhe·​ol·​o·​gy rē-ˈä-lə-jē How to pronounce rheology (audio)
: a science dealing with the deformation and flow of matter
also : the ability to flow or be deformed
rheological adjective
or less commonly rheologic
rheologically adverb
rheologist noun

Example Sentences

Recent Examples on the Web For their analysis, the authors combined two complementary techniques: rheology (relating to how a material deforms) to measure flow properties, and NMR relaxometry to characterize the properties and structures of each mixture. Jennifer Ouellette, Ars Technica, 3 Dec. 2021 Each variety was brushed onto canvas and analyzed using rheology to measure the paint's flow properties. Elizabeth Gamillo, Smithsonian Magazine, 9 Dec. 2021 Dissolve solids other than the rheology modifier in water. Rafil Kroll-zaidi, Harper’s Magazine , 5 July 2019 The seemingly fluid nature of these slinky beasts intrigued researcher Marc-Antoine Fardin, who specializes in rheology, or the flow of matter. Ben Panko, Smithsonian, 15 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rheology.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


International Scientific Vocabulary

First Known Use

1929, in the meaning defined above

Time Traveler
The first known use of rheology was in 1929

Dictionary Entries Near rheology

Cite this Entry

“Rheology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rheology. Accessed 24 Mar. 2023.

Medical Definition


rhe·​ol·​o·​gy rē-ˈäl-ə-jē How to pronounce rheology (audio)
plural rheologies
: a science dealing with the deformation and flow of matter

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