Fissure Design

fis·sure Pronunciation Key - Show Spelled Pronunciation[fish-er] Pronunciation Key - Show IPA Pronunciation noun, verb, -sured, -sur·ing.
–noun 1. a narrow opening produced by cleavage or separation of parts.
2. cleavage (def. 1).
3. Anatomy. a natural division or groove in an organ, as in the brain.
–verb (used with object) 4. to make fissures in; cleave; split.
–verb (used without object) 5. to open in fissures; become split.

[Origin: 1375–1425; late ME < L fissūra cleaving, cleft, fissure, equiv. to fiss(us) divided (see fissi-) + -ūra -ure]


from Wikipedia: In anatomy, fissure (Latin fissura, Plural fissurae) is a groove, natural division, deep furrow, cleft, or tear in various parts of the body.

Brain
Fissure of Bichat: found below the corpus callosum in the cerebellum of the brain.
Broca's fissure: found in the third left frontal fold of the brain.
Burdach's fissure: connects the brain's insula and the inner surface of the operculum.
Calcarine fissure: extends from the occipital of the cerebrum to the occipital fissure.
Callosomarginal fissure: found in the mesial surface of the cerebrum.
Central fissure or Ronaldo's fissure: separates the brain's frontal and parietal lobes.
Clevenger's fissure: found in the inferior temporal lobe of the brain
Collateral fissure: found in the inferior surface of the cerebrum.
Hippocampal fissure: a fissure that extends from the brain's corpus callosum to the tip of the temporal lobe.
Horizontal fissure or Transverse fissure: found between the cerebrum and the cerebellum. Transverse fissure is also found in the liver and lungs.
Occipitoparietal fissure: found between the occipital and parietal lobes of the brain.
Fissure of Sylvius: separates the frontal and parietal lobes of the brain from the temporal lobe.
Wernicke's fissure: separates the brain's temporal and parietal lobes from the occipital lobe.
Zygal fissure: found in the cerebrum.
Auricular fissure: found in the temporal bone
Pterygomaxillary fissure
Sphenoidal fissure: separates the wings and the body of the sphenoid bone.
Longitudinal fissure: found in the lower surface of the liver, also a fissure that separates the right and left hemispheres of the cerebrum.
Portal fissure: found in the under-surface of the liver.
Umbilical fissure: found in front of the liver.
Henle's fissure: the connective tissue between the muscle fibers of the heart.
Palpebral fissure: separates the upper and lower eyelids.

A fissure vent, also known as a volcanic fissure or simply fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is usually a few meters wide and may be many kilometers long. Fissure vents can cause large flood basalts and lava channels