Main Entry: fis·sile

Pronunciation: \ˈfi-səl, ˈfi-ˌsī(-ə)l\

Function: adjective

Etymology: Latin fissilis, from findere

Date: 1661

1 : capable of being split or divided in the direction of the grain or along natural planes of cleavage <fissile wood> <fissile crystals>
2 : capable of undergoing fission

— fis·sil·i·ty \fi-ˈsi-lə-tē\ noun