[1] : The Collaborative International Dictionary of English v.0.48

malthus \malthus\ prop. n.
   thomas robert malthus, an english economist who argued that
   increases in population would outgrow increases in the means
   of subsistence 1766-1834.

   syn: thomas malthus, thomas robert malthus.
        wordnet 1.5

[2] : WordNet (r) 2.0

malthus
     n : an english economist who argued that increases in population
         would outgrow increases in the means of subsistence
         1766-1834 syn: thomas malthus, thomas robert
         malthus
see also:
thomas malthus thomas robert malthus 

Malthus >> M Words
Malthus, definition of term: Malthus
malthus_pag1.html

Thomas Malthus >> T Words
Thomas Malthus, definition of term: Thomas Malthus
thomas+malthus_pag1.html