Webster's English Dictionary

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obsolete

ob.so.lete \.a:b-s*-'le-t, 'a:b-s*-.\ aj [L obsoletus, fr. pp. of 
   obsolescere to grow old, become disused] 1a: no longer in use : DISUSED  
   1b: of a kind or style no longer current : OUTMODED  of a plant or animal 
   part  2: indistinct or imperfect as compared with a corresponding part in 
   relate d organisms : VESTIGIAL - ob.so.lete.ly av