polytropic compression curve

polytropic compression curve

[¦päl·i¦träp·ik kəm′presh·ən ‚kərv]
(physics)
Graphical relationship between pressure p and volume V for various values of specific-heat ratios n in the compression formula pV n = K.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.