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  2  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Amphibole  \Am"phi*bole\  ([a^]m"f[i^]*b[=o]l),  n.  [Gr. 
  'amfi`bolos  doubtful,  equivocal,  fr  'amfiba`llein  to  throw 
  round,  to  doubt:  cf  F.  amphibole.  Ha["u]y  so  named  the  genus 
  from  the  great  variety  of  color  and  composition  assumed  by 
  the  mineral.]  (Min.) 
  A  common  mineral  embracing  many  varieties  varying  in  color 
  and  in  composition.  It  occurs  in  monoclinic  crystals;  also 
  massive,  generally  with  fibrous  or  columnar  structure.  The 
  color  varies  from  white  to  gray,  green,  brown,  and  black.  It 
  is  a  silicate  of  magnesium  and  calcium,  with  usually 
  aluminium  and  iron.  Some  common  varieties  are  {tremolite}, 
  {actinolite},  {asbestus},  {edenite},  {hornblende}  (the  last 
  name  being  also  used  as  a  general  term  for  the  whole 
  species).  Amphibole  is  a  constituent  of  many  crystalline 
  rocks,  as  syenite,  diorite,  most  varieties  of  trachyte,  etc 
  See  {Hornblende}. 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Asbestus  \As*bes"tus\,  Asbestos  \As*bes"tos\  (?;  277),  n.  [L. 
  asbestos  (NL.  asbestus)  a  kind  of  mineral  unaffected  by  fire, 
  Gr  ?  (prop.  an  adj.)  inextinguishable;  'a  priv.  +  ?  to 
  extinguish.]  (Min.) 
  A  variety  of  amphibole  or  of  pyroxene,  occurring  in  long  and 
  delicate  fibers,  or  in  fibrous  masses  or  seams,  usually  of  a 
  white,  gray,  or  green-gray  color.  The  name  is  also  given  to  a 
  similar  variety  of  serpentine. 
  Note:  The  finer  varieties  have  been  wrought  into  gloves  and 
  cloth  which  are  incombustible.  The  cloth  was  formerly 
  used  as  a  shroud  for  dead  bodies,  and  has  been 
  recommended  for  firemen's  clothes.  Asbestus  in  also 
  employed  in  the  manufacture  of  iron  safes,  for 
  fireproof  roofing,  and  for  lampwicks  Some  varieties 
  are  called  amianthus.  --Dana.