Webster's English Dictionary

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blade

blade \'bla-d\ \'bla-d-*d\ n [ME, fr. OE bld; akin to OHG blat leaf, L 
   folium, Gk] phyllon, OE blo-wan to blossom - more at BLOW 1a: LEAF; esp : 
   the leaf of an herb or more narrowly of a gra ss 1b: the flat expanded part 
   of a leaf as distinguished from the petiole  2: something resembling the 
   blade of a leaf : as  2a: the broad flattened part of an oar or paddle  2b: 
   an arm of a screw propeller, centrifugal fan, or steam turbine  2c: a broad 
   flat body part; specif : SCAPULA - used chiefly  in naming cuts of meat 2d: 
   the flat portion of the tongue immediately behind the tip; also :: this 
   portion together with the tip 3a: the cutting part of an implement  3b1: 
   SWORD  3b2: SWORDSMAN  3b3: a jaunty rakish fellow {gay ~}  3c: the runner 
   of an ice skate  - blad.ed aj