• WordNet 3.6
    • adj isothermal of a process or change taking place at constant temperature
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Webster's Revised Unabridged Dictionary
    • a Isothermal (Phys. Geog) Relating to equality of temperature, or an isotherm.
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Century Dictionary and Cyclopedia
    • isothermal Of the same degree of heat; of the same temperature; in physical geography, pertaining to or marking equality of temperature; exhibiting the geographical distribution of temperature: as, an isothermal line; the isothermal relations of different continents; an isothermal chart. Also isothermous.
    • n isothermal An isothermal line; an isotherm.
    • isothermal In crystallography, applied to the lines on a crystal face, or more generally to the surfaces in a crystal, which measure the rate of heat-conductivity, these lines or surfaces being characterized by equal degrees of temperature when heat is applied at a certain point. The isothermal lines on a crystal bear a simple relation to the molecular structure; for example, they are circles on the base of a hexagonal crystal, but ellipses on a prismatic face.
    • n isothermal In thermodynamics, a line or curve determined by the equation of state (pv = RT) of a system, when T has any constant value; a line of equal temperatures.
    • n isothermal In spectrophotometry, a curve showing the distribution of intensities in the spectrum of a source of light maintained at constant temperature. Also called isotherm.
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Chambers's Twentieth Century Dictionary
    • adj Isothermal ī-so-thėr′mal having an equal degree of heat
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Webster's Revised Unabridged Dictionary
Cf. F. isotherme,
Chambers's Twentieth Century Dictionary
Fr. isotherme—Gr. isos, equal, thermē, heat—thermos, hot.


In literature:

They have also comparatively high temperatures; the isotherm for 10 deg.
"The South Pole, Volumes 1 and 2" by Roald Amundsen
The present limit of trees is the isothermal which gives the mean temperature of 500 Fahr.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
The temperate climatic zones extend from the annual isotherm of 20 deg.
"Influences of Geographic Environment" by Ellen Churchill Semple
According to the isotherms for the year the Victorians live in an atmosphere between eight and ten degrees hotter than our own.
"Crime and Its Causes" by William Douglas Morrison
Again, 'the isotherms of Canada pass through Iceland, across about the middle of Norway and Sweden, St Petersburg and Kamtschatka.
"Chambers's Edinburgh Journal, No. 438" by Various
The dotted lines are called 'isotherms' and they follow the lines of places having the same temperature.
"The Boy with the U. S. Weather Men" by Francis William Rolt-Wheeler
The irregular course of the isotherms is due to many causes.
"The Western United States" by Harold Wellman Fairbanks
The same isothermal line, passes through Prussia and Poland, the finest grain countries of Europe.
"Old Mackinaw" by W. P. Strickland
A chart of isothermal lines.
"Commercial Geography" by Jacques W. Redway
Isothermal Chart shewing the Temperature of the Earth's Surface.
"Elements of Agricultural Chemistry" by Thomas Anderson

In news:

Setpoint accuracy, stability and isothermality of ±0.1°C are common with a single-heated zone using an off-the-shelf temperature controller.
Neogen Corp ANSR (Amplified Nucleic Single Temperature Reaction) isothermal pathogen detection system.
The president of the North Carolina Community College System, Dr R Scott Ralls, will meet with the Isothermal Community College Board of Trustees today at 9 am to discuss the college's search for a new president.
Isothermal Community College's Small Business Center is for anyone.

In science:

GPa (see Fig. 1d) excluding all isotherms at temperature higher than 247 K, in order to remain in the validity range of the PEAG model.
Can experiments select the configurational component of excess entropy?
There are three kinds of shock, namely, Rankine-Hugoniot shock, isentropic shock and isothermal shock (Landau & Lifshitz 1987; Chakrabarti 1990).
Unification to the "Pseudo-General-Relativistic" analysis of accretion disks around rotating black holes and neutron stars
In the formation of isothermal shock the radiative cooling is very efficient and some energy and entropy are lost at the shock location keeping unchanged the temperature. ˙M+ < ˙M− and T+ = T− .
Unification to the "Pseudo-General-Relativistic" analysis of accretion disks around rotating black holes and neutron stars
To obtain the resulting accretion flow, we idealize this core as a singular isothermal sphere rotating rigidly with angular velocity Ω◦ .
Trapped Protostellar Winds and their Breakout
While this has been found to be true for isothermal bowshocks (Blondin & Koerwer 1998; Raga et al. 1997), the calculations we next describe indicate that this is not the case in our problem.
Trapped Protostellar Winds and their Breakout