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Webster 1913 Edition

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Noun.

[F.]

(Gun.)

An apparatus for testing or proving the strength of gunpowder.

See also: eprouvette, éprouvette, and êprouvette

Eprouvette f ‎(genitive Eprouvette, plural Eprouvettes)

See also: Eprouvette, éprouvette, and êprouvette

eprouvette ‎(plural eprouvettes)

A one-piece, fixed-elevation mortar formerly used to test the strength of gunpowder.
- 2009 June 10, Dwight Garner, “For Those Who Like Danger, the Home Book of Things Not to Try at Home”, in New York Times:
  From there, he’s on to making things like fuses, rockets and an eprouvette, or small cannon.