This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A small container, such as a bottle, having a narrow neck and usually a cap, especially:

n. A flat, relatively thin container for liquor.

n. A container or case for carrying gunpowder or shot.

n. A vial or round long-necked vessel for laboratory use.

n. A frame for holding a sand mold in a foundry.

n. A container used to discreetly carry a small amount of a hard alcoholic beverage; a pocket flask.

n. 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.

n. A container for holding a casting mold, especially for sand casting molds.

n. A small bottle-shaped vessel for holding fluids.

n. 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.

n. A bed in a gun carriage.

n. The wooden or iron frame which holds the sand, etc., forming the mold used in a foundry; it consists of two or more parts; viz., the cope or top; sometimes, the cheeks, or middle part; and the drag, or bottom part. When there are one or more cheeks, the flask is called a three part flask, four part flask, etc.

n. A bottle, especially one of some peculiar form or material (see below): as, a flask for wine or oil.

n. Specifically— A narrow-necked globular glass bottle: as, a Florence flask.

n. A metallic or other portable dram-bottle, with flat sides: as, a pocket-flask.

n. A vessel, generally of metal or horn, for containing gunpowder, carried by sportsmen, usually furnished with a measure of the charge at the top.

n. An iron vessel for containing mercury, in the shape of a long bottle. A flask of mercury from California is about 75 pounds.

n. A vessel used in a laboratory for sublimation, for digesting in a sand-bath, or for any similar purpose.

n. A shallow frame of wood or iron used in foundries to contain the sand and patterns employed in molding and casting.

n. A bed in a gun-carriage.

n. A long narrow case, as for arrows; a quiver; hence, a set of arrows in a quiver.

n.

n. bottle that has a narrow neck

n. the quantity a flask will hold

"'environment' is not just made up of the flask and media but also the * other cells in the flask* with which it must compete."

containerful   

soyka's bacteria flask    bologna flask    erlenmeyer's flask    giles's flask    liter flask    dewar's flask    miquel flask    molders' flask    fernbach's antitoxin flask    florence flask   

Ask    Basque    Pasch    Rask    ask    bask    basque    cask    lask    mask   

jug    decanter    goblet    bottle    beaker    tumbler    keg    jar    vial    container