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Fissure

 - 5 dictionary results

fis⋅sure

[fish-er] 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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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fis·sure   (fĭsh'ər)   
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-.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

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").
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: fis·sure
Pronunciation: 'fish-&r, Brit also 'fish-yur
Function: noun
1 : a natural cleft between body parts or in thesubstance of an organ: as a : any of several clefts separating the lobes of the liver b : any of various clefts between bones or parts of bones in the skull c : any of the deep clefts of the brain; especially : one of those located at points of elevation in the walls of the ventricles —compare SULCUS d : ANTERIOR MEDIANFISSURE; also : POSTERIOR MEDIAN SEPTUM
2 : a break or slit intissue usually at the junction of skin and mucous membrane <fissure of the lip>
3 : a linear developmental imperfection in the enamel of a tooth —fis·sured /'fish-&rd, Brit also 'fish-yurd/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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