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Definition of: fissure
(fish′ər) noun
1. A narrow opening, cleft, crevice, or furrow.
2. Cleavage.
3. Anat. a Any cleft or furrow of the body, as between the lobes of the liver or the bones of the skull. b One of the furrows on the surface of the brain. See synonyms under BREACH.
—v.t. & v.i. fis·sured, fis·sur·ing To crack; split; cleave. ♦ Homophone: fisher. [<L fissura <findere split]
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