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symmetrymore about symmetry

symmetry


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Symmetry  \Sym"me*try\,  n.  [L.  symmetria,  Gr  ?;  sy`n  with 
  together  +  ?  a  measure:  cf  F.  sym['e]trie.  See  {Syn-},  and 
  {Meter}  rhythm.] 
  1.  A  due  proportion  of  the  several  parts  of  a  body  to  each 
  other  adaptation  of  the  form  or  dimensions  of  the  several 
  parts  of  a  thing  to  each  other  the  union  and  conformity 
  of  the  members  of  a  work  to  the  whole. 
 
  2.  (Biol.)  The  law  of  likeness;  similarity  of  structure; 
  regularity  in  form  and  arrangement;  orderly  and  similar 
  distribution  of  parts  such  that  an  animal  may  be  divided 
  into  parts  which  are  structurally  symmetrical. 
 
  Note:  Bilateral  symmetry,  or  two-sidedness,  in  vertebrates, 
  etc.,  is  that  in  which  the  body  can  be  divided  into 
  symmetrical  halves  by  a  vertical  plane  passing  through 
  the  middle;  radial  symmetry,  as  in  echinoderms,  is  that 
  in  which  the  individual  parts  are  arranged 
  symmetrically  around  a  central  axis;  serial  symmetry, 
  or  zonal  symmetry,  as  in  earthworms,  is  that  in  which 
  the  segments  or  metameres  of  the  body  are  disposed  in  a 
  zonal  manner  one  after  the  other  in  a  longitudinal 
  axis.  This  last  is  sometimes  called  metamerism. 
 
  3.  (Bot.) 
  a  Equality  in  the  number  of  parts  of  the  successive 
  circles  in  a  flower. 
  b  Likeness  in  the  form  and  size  of  floral  organs  of  the 
  same  kind  regularity. 
 
  {Axis  of  symmetry}.  (Geom.)  See  under  {Axis}. 
 
  {Respective  symmetry},  that  disposition  of  parts  in  which 
  only  the  opposite  sides  are  equal  to  each  other 
 
  From  WordNet  r  1.6  [wn]: 
 
  symmetry 
  n  1:  (mathematics)  an  attribute  of  a  shape;  exact  correspondence 
  of  form  on  opposite  sides  of  a  dividing  line  or  plane 
  [syn:  {symmetricalness},  {correspondence},  {balance}] 
  [ant:  {asymmetry}] 
  2:  balance  among  the  parts  of  something  [syn:  {proportion}] 
  [ant:  {disproportion}] 




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