Definitions

1. noun

A unit of length in the metric system, equal to one billionth of a metre.

“The new microscope uses nanometres to measure the tiny particles.”

2. noun

A unit of length used to measure the size of particles or the thickness of a film.

“The scientists used nanometres to study the properties of nanoparticles.”

3. noun

A unit used to measure the thickness of a coating or a layer.

“The nanometre thickness of the paint was crucial for its durability.”