Ar
noun
1.
a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth''s atmosphere
Origin
From Middle English *ar, arres pl, from earlier *er.
Phrases
- AR pupil
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.