A diluting agent; a diluent, or thinner.

plural of dilutant

A substance used for diluting. / (chemistry) A device that adds a measured amount of sample to a measured amount of diluent.

plural of diluter

Of or pertaining to dilution. / That dilutes.

A drink designed to be diluted with water.

Capable of or, more strongly, suitable for being diluted.

Causing dilution.

An animal having a lighter-coloured coat than is usual.

(transitive) To make thinner by adding solvent to a solution, especially by adding water. / (transitive) To weaken, especially by adding a foreign substance.