Librate

v. i.	1.	To vibrate as a balance does before resting in equilibrium; hence, to be poised. [imp. & p. p. Librated (lī"brã*tĕd); p. pr. & vb. n. Librating.] Their parts all librate on too nice a beam. - Clifton.
v. t.	1.	To poise; to balance.

Verb	1.	librate - determine the weight of; "The butcher weighed the chicken" Synonyms: weigh
	2.	librate - vibrate before coming to a total rest; "the children's swing librated"

heft, measure, quantify, weigh