Definitions

1. noun

A chemical element (symbol Se, from the Latin ‘selenion’), a nonmetallic element that resembles sulfur and tellurium in its chemical properties and is used in photovoltaic cells, glass tints, and insecticides.

“The research team studied the properties of selenium in solar panels.”

2. noun

A web automation tool, a collection of libraries and tools that enable users to automate web browsers.

“The software engineer used Selenium to test the new website for bugs.”

3. adjective

Relating to or resembling the element selenium.

“The new selenium-based battery technology showed great promise for the future.”