'Elatrometer' definitions:

Definition of 'Elatrometer'

From: GCIDE

Elatrometer \El`a*trom"e*ter\, n. [Gr. ? a driver + -meter.] (Physics) An instrument for measuring the degree of rarefaction of air contained in the receiver of an air pump. [Spelt also elaterometer.] [1913 Webster]