fissile

Adjective

1. capable of undergoing nuclear fission; “a fissionable nucleous”; “fissionable material”
   • Synonyms
     • fissionable
   • Antonyms
     • nonfissionable
   • Topic Members
     • physics
     • natural philosophy
2. capable of being split or cleft or divided in the direction of the grain; “fissile crystals”; “fissile wood”
   • Antonyms
     • nonfissile

fissile - LookUp

adjective

1. Physics (of an atom or element) able to undergo nuclear fission a fissile isotope

2. Geology (chiefly of rock) easily split flat-bedded and very highly fissile shale

Origin

mid 17th century (in the sense easily split ): from Latin fissilis , from fiss- split, cracked , from the verb findere

Urban Dictionary

Something that undergoes scientific fission, which is dividing or spiliting up.

A fissile isotope