乳比重計; 乳液比重計
Galactometer \Gal`ac*tom"e*ter\, n. [Gr. ?, ?, milk + -meter:
cf. F. galactom[`e]tre. Cf. {Lactometer}.]
An instrument for ascertaining the quality of milk (i.e., its
richness in cream) by determining its specific gravity; a
lactometer.