virial-theorem mass

virial-theorem mass

[¦vir·ē·əl ′thir·əm ‚mas]
(astronomy)
The mass of a cluster of stars or galaxies calculated from the observed mean-square velocity of the objects and application of the virial theorem.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.