The building has a quadrangular shape.

Quantum dots are used in various applications, such as solar cells and medical imaging.

The scientist studied the properties of the quantum onion.

The quantum well is a key component in semiconductor devices.

The quadruplicate puzzle has four identical pieces.

Please make four copies of the document in quadruplicate.

She decided to quadruplicate the recipe for the party.

The quadrennial event is always highly anticipated by sports fans.

The Olympic Games are held on a quadrennial basis.

The quantity theory of money states that there is a direct relationship between the quantity of money in an economy and the level of prices.