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kaolin

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kaolin


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Kaolin  \Ka"o*lin\,  Kaoline  \Ka"o*line\,  n.  [Chin.  kao-ling.] 
  (Min.) 
  A  very  pure  white  clay,  ordinarily  in  the  form  of  an 
  impalpable  powder,  and  used  to  form  the  paste  of  porcelain; 
  China  clay;  porcelain  clay.  It  is  chiefly  derived  from  the 
  decomposition  of  common  feldspar. 
 
  Note:  The  name  is  now  applied  to  all  porcelain  clays  which 
  endure  the  fire  without  discoloration. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Clay  \Clay\  (kl[=a]),  n.  [AS.  cl[=ae]g;  akin  to  LG  klei,  D. 
  klei,  and  perh.  to  AS  cl[=a]m  clay,  L.  glus,  gluten  glue, 
  Gr  gloio`s  glutinous  substance,  E.  glue.  Cf  {Clog}.] 
  1.  A  soft  earth,  which  is  plastic,  or  may  be  molded  with  the 
  hands,  consisting  of  hydrous  silicate  of  aluminium.  It  is 
  the  result  of  the  wearing  down  and  decomposition,  in  part 
  of  rocks  containing  aluminous  minerals,  as  granite.  Lime, 
  magnesia,  oxide  of  iron,  and  other  ingredients,  are  often 
  present  as  impurities. 
 
  2.  (Poetry  &  Script.)  Earth  in  general,  as  representing  the 
  elementary  particles  of  the  human  body;  hence  the  human 
  body  as  formed  from  such  particles. 
 
  I  also  am  formed  out  of  the  clay.  --Job  xxxiii 
  6. 
 
  The  earth  is  covered  thick  with  other  clay,  Which 
  her  own  clay  shall  cover.  --Byron. 
 
  {Bowlder  clay}.  See  under  {Bowlder}. 
 
  {Brick  clay},  the  common  clay,  containing  some  iron,  and 
  therefore  turning  red  when  burned. 
 
  {Clay  cold},  cold  as  clay  or  earth;  lifeless;  inanimate. 
 
  {Clay  ironstone},  an  ore  of  iron  consisting  of  the  oxide  or 
  carbonate  of  iron  mixed  with  clay  or  sand. 
 
  {Clay  marl},  a  whitish,  smooth,  chalky  clay. 
 
  {Clay  mill},  a  mill  for  mixing  and  tempering  clay;  a  pug 
  mill. 
 
  {Clay  pit},  a  pit  where  clay  is  dug. 
 
  {Clay  slate}  (Min.),  argillaceous  schist;  argillite. 
 
  {Fatty  clays},  clays  having  a  greasy  feel  they  are  chemical 
  compounds  of  water,  silica,  and  aluminia,  as  {halloysite}, 
  {bole},  etc 
 
  {Fire  clay},  a  variety  of  clay,  entirely  free  from  lime, 
  iron,  or  an  alkali,  and  therefore  infusible,  and  used  for 
  fire  brick. 
 
  {Porcelain  clay},  a  very  pure  variety,  formed  directly  from 
  the  decomposition  of  feldspar,  and  often  called  {kaolin}. 
 
 
  {Potter's  clay},  a  tolerably  pure  kind  free  from  iron. 
 
  From  WordNet  r  1.6  [wn]: 
 
  kaolin 
  n  :  a  fine  usually  white  clay  formed  by  the  weathering  of 
  aluminous  minerals  (as  feldspar);  used  in  ceramics  and  as 
  an  absorbent  and  as  a  filler  (e.g.,  in  paper)  [syn:  {china 
  clay},  {china  stone},  {kaoline},  {porcelain  clay},  {terra 
  alba}] 




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