| fissure | (n) (anatomy) a long narrow slit or groove that divides an organ into lobes |
| fissure | (v) break into fissures or fine cracks |
| fissurella | (n) type genus of the family Fissurellidae: keyhole limpets, Syn. genus Fissurella |
| fissurellidae | (n) marine limpets, Syn. family Fissurellidae |
| fissure of rolando | (n) a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes, Syn. Rolando's fissure, sulcus centralis, central sulcus |
| fissure of sylvius | (n) the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres, Syn. Sylvian fissure, lateral cerebral sulcus, sulcus lateralis cerebri |
| Fissural | a. Pertaining to a fissure or fissures; |
| Fissuration | n. (Anat.) The act of dividing or opening; the state of being fissured. [ 1913 Webster ] |
| Fissure | n. [ L. fissura, fr. findere, fissum, to cleave, split; akin to E. bite: cf. F. fissure. ] A narrow opening, made by the parting of any substance; a cleft;
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| Fissure | v. t. To cleave; to divide; to crack or fracture. [ 1913 Webster ] |
| Fissurella | ‖n. [ NL., dim. of L. fissura a fissure. ] (Zool.) A genus of marine gastropod mollusks, having a conical or limpetlike shell, with an opening at the apex; -- called also |
| Fissurellidae | n. a natural family of marine limpets. |