Definition of xenon
: a heavy colorless and relatively inert gaseous element that occurs in air as about one part in 20 million and is used especially in specialized electric lamps (such as flashtubes) and in scientific research — see element table
Recent Examples of xenon from the Web
A new study suggests that about 20 percent of the noble gas xenon in Earth's atmosphere was delivered by comets long ago.
The chamber filled with 10 tons of liquid xenon will sit inside that, and more than 500 photomultiplier tubes—
Over the last 30 years, as automotive lighting has graduated from incandescent bulbs to halogen, xenon and now LED, headlamps have definitely gotten brighter.
The idea is that a dark matter particle might whoosh by a xenon atom, knocking off an electron, which LUX would detect as an increase in charge.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'xenon'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of xenon
Greek, neuter of xenos strange
First Known Use: 1898See Words from the same year
XENON Defined for English Language Learners
Definition of xenon for English Language Learners
: a chemical element that is a colorless gas and that is used especially in electric lights
Seen and Heard
What made you want to look up xenon? Please tell us where you read or heard it (including the quote, if possible).