Definition of


  1. (noun, person) a dancer who sounds out rhythms by using metal taps on the toes and heels of the shoes
  2. (noun, person) someone who wiretaps a telephone or telegraph wire
  3. (noun, person) a worker who uses a tap to cut screw threads
  4. (noun, person) a person who strikes a surface lightly and usually repeatedly
  5. (noun, person) a tavern keeper who taps kegs or casks

via WordNet, Princeton University

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Richard E. Smalley

American chemist who with Robert Curl and Harold Kroto discovered fullerenes and opened a new branch of chemistry (born in 1943)