X-ray binaries are binary star systems that emit X-rays.

X-ray microscopes are used to study the internal structure of materials.

Cathode-ray tubes were commonly used in old television sets.

Cathode ray tubes were commonly used in old television sets.

I love to catch some rays at the beach.

The grocery shrink ray is a common tactic used by companies to reduce the size of their products while keeping the price the same.

The spinal butterfly ray is a type of fish found in tropical waters.

I just bought a new Blu-ray drive for my computer.

I have multiple Blu-ray drives connected to my computer.

I bought a Blu-ray burner for my computer.