Definitions for: Fissure


[n] (anatomy) a long narrow slit or groove that divides an organ into lobes
[n] a long narrow opening
[n] a long narrow depression in a surface
[v] break into fissures or fine cracks



Webster (1913) Definition: Fis"sure, 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; as, the fissure of a rock.

Cerebral fissures (Anat.), the furrows or clefts by which
the surface of the cerebrum is divided; esp., the furrows
first formed by the infolding of the whole wall of the
cerebrum.

Fissure needle (Surg.), a spiral needle for catching
together the gaping lips of wounds. --Knight.

Fissure of rolando (Anat.), the furrow separating the
frontal from the parietal lobe in the cerebrum.

Fissure of Sylvius (Anat.), a deep cerebral fissure
separating the frontal from the temporal lobe. See Illust.
under Brain.

Fissure vein (Mining), a crack in the earth's surface
filled with mineral matter. --Raymond.


Fis"sure, v. t.
To cleave; to divide; to crack or fracture.

Synonyms: chap, cleft, crack, crack, cranny, crevice, crevice, scissure

See Also: break, chap, chink, crack, crater, crevasse, depression, fatigue crack, fault, fracture, gap, geological fault, groove, hilum, hilus, impression, imprint, opening, rift, shift, slit, split, sulcus, vallecula, vent, volcanic crater, volcano

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