Isometric lines

(Thermodynamics) lines representing in a diagram the relations of pressure and temperature in a gas, when the volume remains constant.

See also: Isometric

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The fact that his early experiments with so-called traditional forms--rhymes and slant rhymes, regular meter, isometric lines, and numbered stanzas--have come back is telling.