Laplacian speed of sound

Laplacian speed of sound

[lə′pläs·ē·ən ¦spēd əv ′sau̇nd]
(fluid mechanics)
The phase speed of a sound wave in a compressible fluid under the assumption that the expansions and compressions are adiabatic.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.