WordNet (r) 3.0 (2006):

seaborgium
    n 1: a transuranic element [syn: seaborgium, Sg, element
         106, atomic number 106]

The Elements (07Nov00):

seaborgium
Name proposed for the 106th element (unnilhexium) by the American
Chemical Society in honor of Gleen T. Seaborg, an American nuclear
physicist and Nobel prize winner.