1. (physics) a postulated low mass chargeless particle with small interactions; a candidate for dark matter in the universe

Derived forms: axions

Encyclopedia: Axion

• unrestricted
• unrestrictive
• unretentive
• unretrievable
• unrevealed
• unrevealing
• unreverberant
• unrevised
• unrevived
• unrewarded
• unrewarding
• unrhetorical
• unrhymed
• unrhythmic
• unrhythmical
• unrifled
• unrig
• unrigged
• unrighteous
• unrighteously
• unrighteousness
• unrimed
• unrip
• unripe
• unripened