isostasy

1 of 2

noun

isos·​ta·​sy ī-ˈsä-stə-sē How to pronounce isostasy (audio)
1
: general equilibrium in the earth's crust maintained by a yielding flow of rock material beneath the surface under gravitative stress
2
: the quality or state of being subjected to equal pressure from every side
isostatic adjective
isostatically adverb

isostatic

2 of 2

adjective

iso·​static
1
a
: subjected to equal pressure from every side
b
: being in hydrostatic equilibrium
2
: relating to or characterized by isostasy
isostatically adverb

Examples of isostasy in a Sentence

Recent Examples on the Web
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Noun
In geology, this crust-mantle balance is called isostasy. Carly Miller, Forbes, 30 Sep. 2024

Word History

Etymology

Noun

International Scientific Vocabulary is- + Greek -stasia condition of standing, from histanai to cause to stand — more at stand

Adjective

International Scientific Vocabulary is- + static; originally formed as French isostatique

First Known Use

Noun

1889, in the meaning defined at sense 1

Time Traveler
The first known use of isostasy was in 1889

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Cite this Entry

“Isostasy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isostasy. Accessed 13 Jun. 2026.

Kids Definition

isostasy

noun
isos·​ta·​sy ī-ˈsäs-tə-sē How to pronounce isostasy (audio)
: the state of balance that exists between the earth's crust and the denser rock material beneath
isostatic adjective

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