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amphibole

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amphibole


  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  WordNet  r  1.6  [wn]: 
 
  amphibole 
  n  :  a  mineral  or  mineral  variety  belonging  to  the  amphibole 
  group 




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