The leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant

An Arab country on the peninsula of Qatar; achieved independence from the United Kingdom in 1971; the economy is dominated by oil

Khat or qat is a flowering plant native to eastern and southern Africa.

In enzymology, a quaternary-amine-transporting ATPase is an enzyme that catalyzes the chemical reaction ATP + H2O + quaternary amineout ⇌ {\displaystyle \rightleftharpoons } ADP + phosphate + quaternary amineinThe 3 substrates of this enzyme are ATP, H2O, and quaternary amine, whereas its 3 products are ADP, phosphate, and quaternary amine.

Qat is the principal god in the oral mythology of the Banks Islands, a small archipelago of northern Vanuatu, Melanesia.

Qat is een licht stimulerende drug.