01 a. Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of cleavage, like crystals.
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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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2.
Fissionable.