[ˈfɪsʌɪl], (Adjective)

Definitions:
- (of an atom or element) able to undergo nuclear fission
(e.g: a fissile isotope)

- (chiefly of rock) easily split
(e.g: flat-bedded and very highly fissile shale)


Phrases:

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