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sigmoidmore about sigmoid

sigmoid


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Semilunar  \Sem`i*lu"nar\,  a. 
  Shaped  like  a  half  moon. 
 
  {Semilunar  bone}  (Anat.),  a  bone  of  the  carpus;  the  lunar. 
  See  {Lunar},  n. 
 
  {Semilunar},  or  {Sigmoid},  {valves}  (Anat.),  the  valves  at 
  the  beginning  of  the  aorta  and  of  the  pulmonary  artery 
  which  prevent  the  blood  from  flowing  back  into  the 
  ventricle. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Sigmoid  \Sig"moid\,  Sigmoidal  \Sig*moid"al\,  a.  [Gr.  ???;  ??? 
  sigma  +  ???  form  likeness:  cf  F.  sigmo["i]de.] 
  Curved  in  two  directions,  like  the  letter  S,  or  the  Greek 
  [sigmat]. 
 
  {Sigmoid  flexure}  (Anat.),  the  last  curve  of  the  colon  before 
  it  terminates  in  the  rectum.  See  Illust.  under 
  {Digestive}. 
 
  {Sigmoid  valves}.  (Anat.)  See  {Semilunar  valves},  under 
  {Semilunar}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  sigmoid 
  adj  1:  curved  in  two  directions  (like  the  letter  S) 
  2:  of  or  relating  to  the  sigmoid  flexure  in  the  large  intestine 
  [syn:  {sigmoidal}] 




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