(law) A clause in an insurance policy in which the insurance company agrees to pay out double the normal coverage in certain specified circumstances, most often in case of accidental death

plural of double-crosser

A bottle of wine (usually Bordeaux) containing 3 liters of fluid, four times the volume of a standard bottle.

Describing an experiment (usually medical) in which some information which might influence the experiment is withheld from two parties. Most commonly, parties in question are the subjects and the administrators and the information which is withheld is the treatment groups of the subjects.

One who double-crosses.

Being a number between 10 and 99 inclusive, a number that requires two digits to write in base 10.

plural of double-dealer

A knitted fabric consisting of a double thickness, made on a machine with two sets of needles.

Possessing hypermobility of the joints.

Alternative spelling of double knit