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supercritical

American  
[soo-per-krit-i-kuhl] / ˌsu pərˈkrɪt ɪ kəl /

adjective

  1. extremely critical.

  2. Physics. pertaining to a mass of radioactive material in which the rate of a chain reaction increases with time.


supercritical British  
/ ˌsuːpəˈkrɪtɪkəl /

adjective

  1. physics (of a fluid) brought to a temperature and pressure higher than its critical temperature and pressure, so that its physical and chemical properties change

  2. nuclear physics of or containing more than the critical mass

"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

Other Word Forms

  • supercritically adverb
  • supercriticalness noun

Etymology

Origin of supercritical

First recorded in 1600–10; super- + critical

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In this model, cracked regions of the crust are thought to contain water at extremely high temperatures and pressures, possibly in a supercritical state.

From Science Daily

But in December, the government said it would keep Cirebon-1 open, citing its long potential lifespan and "supercritical" technology, which burns coal more efficiently than older plants.

From Barron's

Some former U.S. officials said the U.S. doesn’t need to carry out such “supercritical tests” because it uses advanced computer simulations to determine the reliability of its stockpile.

From The Wall Street Journal

One possible explanation for the ultraluminosity is that an extraordinary amount of gas falls onto a compact object through a process called supercritical accretion.

From Science Daily

It relies on heating and pressurising water to such a high degree that it enters a new state of matter: a so-called supercritical state.

From BBC