radon
noun
Simple meaning
The chemical element with atomic number 86.
Pronunciation
Say it like this:
raydahnSay the bold part a little louder.
IPA pronunciation (US)
ˈɹeɪdɑn
This word is pronounced essentially the same in American and British English, so one transcription covers both.
IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.
Definition
Everyday modern meanings first, grouped by part of speech.
noun
Radon-222 (²²²₈₆Rn), the most stable isotope of said element.
Johann Radon (1887-1956), an Austrian mathematician with results in measure theory, functional analysis and geometry.
The chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas.
Word at a Glance
- Frequency
- Uncommon
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- Technical
- Typical Use
- Varies by meaning
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