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| smooth surface area at the end of a bone, forming part of a joint |
| line or linear body structure |
| fissure (ˈfɪʃə) | |
| —n | |
| 1. | any long narrow cleft or crack, esp in a rock |
| 2. | a weakness or flaw indicating impending disruption or discord: fissures in a decaying empire |
| 3. | anatomy See also sulcus a narrow split or groove that divides an organ such as the brain, lung, or liver into lobes |
| 4. | a small unnatural crack in the skin or mucous membrane, as between the toes or at the anus |
| 5. | a minute crack in the surface of a tooth, caused by imperfect joining of enamel during development |
| —vb | |
| 6. | to crack or split apart |
| [C14: from medical Latin fissūra, from Latin fissus split] | |
fissure fis·sure (fĭsh'ər)
n.
A deep furrow, cleft, or slit.
A developmental break or fault in the enamel of a tooth.
| fissure (fĭsh'ər) Pronunciation Key
A long, narrow crack or opening in the face of a rock. Fissures are often filled with minerals of a different type from those in the surrounding rock. |