Definition of Seidlitz powder in US English:

Seidlitz powder

noun

  • A laxative preparation that contains tartaric acid, sodium potassium tartrate, and sodium bicarbonate, and that effervesces when mixed with water.

Origin

Late 18th century: named with reference to the mineral water of Seidlitz, a village in Bohemia.

Pronunciation

Seidlitz powder

/ˈsedlits ˌpoudər/