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Webster 1913 Edition

Noun.

[

Nitro-

-meter

: cf. F.

nitromètre

(Chem.)

An apparatus for determining the amount of nitrogen or some of its compounds in any substance subjected to analysis; an azotometer.

Noun.

[Gr. to measure.] An instrument for ascertaining the quality or value of niter.

nitrometer ‎(plural nitrometers)

(chemistry) An apparatus for determining the amount of nitrogen or some of its compounds in a substance.

apparatus