powder flask or powder horn noun

A flask (orig a horn) for carrying gunpowder

powˈdering-gown noun

A loose dressing-gown worn while the hair was being powdered

powˈdering-tub noun

1. A vessel in which meat is salted
2. A tub used in the treatment of venereal disease by sweating (obsolete)

powder keg noun

1. A small barrel for gunpowder
2. A potentially explosive situation

powder magazine noun

A place where gunpowder is stored

powder metallurgy noun

The science and art of preparing metals for use by reducing them, as a stage in the process, to powder form

powder mill noun

A mill in which gunpowder is made

powder monkey noun

1. A boy carrying powder from the magazine to the gunners on a ship-of-war (historical)
2. Generally, someone who carries out blasting operations

powder puff noun

1. A pad of velvety or fluffy material for dusting powder onto the skin
2. An effeminate male homosexual (slang)

powder room noun

1. A ship's powder magazine
2. A room for powdering the hair (also powˈdering-room)
3. A ladies' cloakroom or toilet (euphemistic)

powˈder-skiing noun

(the art of) skiing in powder snow such as that encountered off piste

powder snow noun

Freshly fallen loose thick dry snow

powdery mildew noun

1. A plant disease affecting eg roses, caused by a parasitic fungus (family Erysiphaceae), whose spores appear as a powdery white covering on leaves and stems
2. Any of the fungi that cause this disease

keep one's powder dry

1. To preserve one's energies so as to be able to act when the moment comes, play a waiting game
2. To observe all practical precautions

powder one's nose (euphemistic; of a woman)

To go to the toilet