fis·sile /ˈfɪsəl, ˈfɪˌsaɪl/
  (a.)易分裂的,易裂的,分裂性的
  Fis·sile a.
  1. Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals.
     This crystal is a pellucid, fissile stone.   --Sir I. Newton.
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  fissile
       adj 1: capable of undergoing nuclear fission; "a fissionable
              nucleous"; "fissionable material" [syn: fissionable]
              [ant: nonfissionable]
       2: capable of being split or cleft or divided in the direction
          of the grain; "fissile crystals"; "fissile wood" [ant: nonfissile]