powder
n. C / U B1 Intermediate Oxford US //ˈpaʊdɝ// UK //pˈaʊdɐ// pow·der
n. a dry substance made of many tiny, loose pieces. You often see this in the kitchen with flour or in the bathroom with makeup.
n. a substance consisting of ground, pulverized, or otherwise finely dispersed solid particles. Often used to describe cosmetic, medicinal, or culinary materials.
She put some white powder on the cake.
The chemist ground the crystals into a fine powder before adding them to the liquid solution.
Freshly fallen snow had covered the mountain in a thick layer of dry powder, creating perfect conditions for the morning's first group of skiers.
Usage
Uncountable when referring to the substance in general; countable when referring to specific types or individual doses.