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ripidolite

American  
[ri-pid-l-ahyt, rahy-] / rɪˈpɪd lˌaɪt, raɪ- /

noun

  1. a mineral of the chlorite group, essentially hydrated magnesium and aluminum silicate with some ferrous iron.


Etymology

Origin of ripidolite

1840–50; < German Ripidolith < Greek rhīpid- (stem of rhīpís ) fan + -o- -o- + German -lith -lite