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fissure
8 dictionary results for: fissure
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
fis·sure       [fish-er] Pronunciation Key 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]

fis·su·ral, adjective
fis·sure·less, adjective
American Heritage Dictionary - Cite This Source - Share This
fis·sure       (fĭsh'ər)  Pronunciation Key 
n.  
  1. A long narrow opening; a crack or cleft.
  2. The process of splitting or separating; division.
  3. A separation into subgroups or factions; a schism.
  4. Anatomy A normal groove or furrow, as in the liver or brain, that divides an organ into lobes or parts.
  5. Medicine A break in the skin, usually where it joins a mucous membrane, producing a cracklike sore or ulcer.

intr. & tr.v.   fis·sured, fis·sur·ing, fis·sures
To form a crack or cleft or cause a crack or cleft in.


[Middle English, cut, from Old French, from Latin fissūra, from fissus, split; see fissi-.]

Online Etymology Dictionary - Cite This Source - Share This
fissure 
c.1400, from O.Fr. fissure, from L. fissura "a cleft," from root of findere "to split, cleave," from PIE *bhi-n-d-, from base *bheid- "to split" (cf. Skt. bhinadmi "I cleave," O.H.G.bizzan "to bite," O.E.bita "a piece bitten off,morsel," O.N. beita "tohunt with dogs," beita"pasture, food").

WordNet - Cite This Source - Share This
fissure

noun
1. a long narrow depression in a surface [syn: crevice
2. a long narrow opening [syn: crack
3. (anatomy) a long narrow slit or groove that divides an organ into lobes 

verb
1. break into fissures or fine cracks 

The American Heritage Science Dictionary - Cite This Source - Share This
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.

American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

fissure fis·sure (fĭsh'ər)
n.

  1. A deep furrow, cleft, or slit.
  2. A developmental break or fault in the enamel of a tooth.

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Fissure

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.

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Fissure

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

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