He called him a Dopper because of his religious beliefs.

The Dopplerian effect is observed when there is a change in frequency due to the relative motion between the source and the observer.

The doctor used a Doppler to listen to the baby's heartbeat.

I have two dopplers to measure blood flow.

I ordered two doppios at the coffee shop.

The doppich sweater kept me warm in the cold weather.

Transcranial Dopplers are used to measure blood flow in the brain.

Transcranial Doppler is a non-invasive diagnostic test that uses ultrasound to measure the blood flow velocity in the brain.

Doppelgänger is a term used to describe a person who looks remarkably similar to someone else.

Doppler radars are used to track the movement of storms.