WordNet (r) 3.0 (2006):

Thompson
    n 1: United States classical archaeologist (born in Canada)
         noted for leading the excavation of the Athenian agora
         (1906-2000) [syn: Thompson, Homer Thompson, Homer A.
         Thompson, Homer Armstrong Thompson]
    2: English physicist (born in America) who studied heat and
       friction; experiments convinced him that heat is caused by
       moving particles (1753-1814) [syn: Thompson, Benjamin
       Thompson, Count Rumford]