American Heritage Dictionary
(4)
Century Dictionary
(5)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Alternatively, transport proteins can be assayed for interactions with ligands by using techniques such as isothermal titration calorimetry, nuclear magnetic resonance spectroscopy, or surface plasmon resonance.— CiteULike: Everyone's library
It is not a single, homogeneous, isothermal layer.— RealClimate
Within a blackbody material with real index of refraction n, with an isothermal region of infinite optical thickness, or an infinite isothermal expanse of blackbodies embeded within some material with index of refraction n, the blackbody fluxes and intensities within the material will be proportional to n^2.— RealClimate
If there is an antireflective interface with a vacuum (n = 1) or air (n ~ = 1), Total internal reflection keeps the flux and intensity of blackbody radiation escaping the material across the interface equal to (or very nearly so for air) the standard blackbody values if the isothermal material is thick enough to block any radiation from behind it.— RealClimate
At wavelengths where there is just sufficient opacity, the atmosphere looks like a surface on a large scale, although it will not radiate as a perfect blackbody because it is not isothermal across the visible depth - but at sufficiently high opacity, individual nearly-isothermal layers of air will act, radiatively, like surfaces.— RealClimate

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a year.
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