lodestar n[perhaps from the notion of the lodestar as a guiding light or principle]
: the amount obtained by multiplying the reasonable amount of hours spent by an attorney working on a case by the reasonable hourly billing rate for purposes of calculating an award of attorney's fees
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.