flask

Short definition from Wiktionary

Noun

1. 1
   A narrow-necked vessel of metal or glass, used for various purposes; as of sheet metal, to carry gunpowder in; or of wrought iron, to contain quicksilver; or of glass, to heat water in, etc.
2. 2
   A container used to discreetly carry a small amount of a hard alcoholic beverage; a pocket flask.
3. 3
   Laboratory glassware used to hold larger volumes than test tubes, normally having a narrow mouth of a standard size which widens to a flat or spherical base.
4. 4
   A container for holding a casting mold, especially for sand casting molds.
5. 5
   A bed in a gun carriage.
6. 6
   A nuclear flask, a large, secure lead-lined container for the transport of nuclear material.
7. 7
   A small bottle of liquor.

Verb

1. 1
   To invest a denture in a flask so as to produce a sectional mold.