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fissure

[fish-er] /ˈfɪʃ ər/
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), fissured, fissuring.
4.
to make fissures in; cleave; split.
verb (used without object), fissured, fissuring.
5.
to open in fissures; become split.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Latin fissūra cleaving, cleft, fissure, equivalent to fiss(us) divided (see fissi-) + -ūra -ure
Related forms
fissural, adjective
fissureless, adjective
subfissure, noun
superfissure, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for fissureless

fissure

/ˈfɪʃə/
noun
1.
any long narrow cleft or crack, esp in a rock
2.
a weakness or flaw indicating impending disruption or discord: fissures in a decaying empire
3.
(anatomy) a narrow split or groove that divides an organ such as the brain, lung, or liver into lobes See also sulcus
4.
a small unnatural crack in the skin or mucous membrane, as between the toes or at the anus
5.
a minute crack in the surface of a tooth, caused by imperfect joining of enamel during development
verb
6.
to crack or split apart
Word Origin
C14: from medical Latin fissūra, from Latin fissus split
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for fissureless

fissure

n.

c.1400, from Old French fissure (13c.) and directly from Latin fissura "a cleft," from root of findere "to split, cleave," from PIE *bhi-n-d-, from root *bheid- "to split" (cf. Sanskrit bhinadmi "I cleave," Old High German bizzan "to bite," Old English bita "a piece bitten off, morsel," Old Norse beita "to hunt with dogs," beita "pasture, food").

Online Etymology Dictionary, © 2010 Douglas Harper
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fissureless in Medicine

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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fissureless in Science
fissure
  (fĭsh'ər)   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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