Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. (of a gas) Above its critical temperature and critical pressure
  • adj. Having a mass sufficient to sustain a chain reaction
  • adj. Above the speed of sound
  • adj. Above some other critical value or range

from The Century Dictionary and Cyclopedia

  • Excessively critical; hypercritical.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. (especially of fissionable material) able to sustain a chain reaction in such a manner that the rate of reaction increases

Etymologies

Sorry, no etymologies found.

Examples

  • A so-called supercritical plant operates at sufficiently high pressures and temperatures (between 1000 and 1075 degrees Fahrenheit) such that the water and steam become indistinguishable (the critical point of a liquid), allowing efficiency rates to reach 42 percent.

    Bill Chameides: China's Going Supercritical -- A Critical Test for China and World?

  • New rules mean that about one fifth of India's new coal plants will be among the efficient (so-called supercritical) plants that are standard fare in much of the rest of the world.

    He Protests Too Much

  • Even worse, the World Bank classifies these coal plants as "low carbon" financing projects if they are the so-called supercritical type with marginally better CO2 emissions rates.

    Mindy S. Lubber: Climate Follies: Bankrolling Dirty Power in Developing Countries

  • When CO2 is captured and prepared for storage, it enters what scientists call a supercritical phase: it behaves both like a liquid and a gas.

    David Sassoon: Are Environmentalists and the Fossil Fuel Industry Calling a Truce?

  • In both phases, the cellulosic material is treated by water at a pressure and temperature that is so high that the water is neither steam nor an ordinary liquid but in a form known as "supercritical."

    NYT > Home Page

  • In both phases, the cellulosic material is treated by water at a pressure and temperature that is so high that the water is neither steam or an ordinary liquid but in a form known as "supercritical."

    NYT > Home Page

  • When the water is in the so-called supercritical phase, the company says, its pH level can be adjusted to turn it into an acid.

    NYT > Home Page

  • Renmatix says its industrial-scale process breaks down cellulose through something called "supercritical hydrolysis," which uses water at high temperatures and pressures to quickly solubilize cellulose from sources such as wood.

    Breaking News: CBS News

  • Medupi is designed to operate at higher steam pressures and temperatures (termed supercritical) which enables it to achieve a higher efficiency than Eskom's existing coal-fired [plants].

    Guardian Online

  • The technology, referred to as a supercritical binary geothermal cycle, is estimated to be more efficient than traditional geothermal binary systems, allowing lower-temperature geothermal resources to be used for power generation.

    U.S. Department of Energy - Press Releases

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