ultrapure

[ uhl-truh-pyoor ]

adjective

1. extremely pure, especially without impurities:

   ultrapure silicon for semiconductors.

Other Words From

• ultra·purely adverb
• ultra·puri·ty noun

Word History and Origins

Origin of ultrapure¹

First recorded in 1960–65; ultra- + pure

Example Sentences

He was part of a team at New York University that anchored in place cylinders of ultrapure ice.

From Science News For Students

After dumping those wires into ultrapure water, they flash-froze the mix in liquid nitrogen.

From Science News For Students