Source : WordNet®

Robert Hooke
     n : English scientist who formulated the law of elasticity and
         proposed a wave theory of light and formulated a theory
         of planetary motion and proposed the inverse square law
         of gravitational attraction and discovered the cellular
         structure of cork and introduced the term `cell' into
         biology and invented a balance spring for watches
         (1635-1703) [syn: {Hooke}]