'Lactometer' definitions:

Definition of 'Lactometer'

From: GCIDE

Lactometer \Lac*tom"e*ter\, n. [L. lac, lactis, milk + meter: cf. F. lactom[`e]tre. Cf. Galactometer.] An instrument for estimating the purity or richness of milk, as a measuring glass, a specific gravity bulb, or other apparatus. [1913 Webster]