1. Capable of undergoing nuclear fission
   - fissionable 
2. Capable of being split or cleft or divided in the direction of the grain
   "fissile crystals"; "fissile wood"

Antonym: nonfissile

Encyclopedia: Fissile

• well-preserved
• well-proportioned
• well-qualified
• well-read
• well-rounded
• well-set
• well-shaven
• well-situated
• well-spoken
• well-thought-of
• well-thumbed
• well-timed
• well-to-do
• well-tried
• well-turned
• well-versed
• well-wisher
• well-wishing
• well-worn
• wellbeing
• wellborn
• wellerism
• Welles
• wellhead
• wellie