The Collaborative International Dictionary of English v.0.48:

amyloidosis \am`y*loi*do"sis\ ([a^]m`[i^]*loi*d[=o]"s[i^]s), n.
   (Med.)
   A disorder characterized by deposit of extracellular
   amyloid[2] in organs or tissues in an amount that interferes
   with normal function of the affected organ; it is often
   secondary to chronic rheumatoid arthritis or tuberculosis or
   multiple myeloma. Called also amyloid degeneration waxy
   degeneration and lardaceous degeneration.
   [WordNet 1.5 + AS]

WordNet (r) 3.0 (2006):

amyloidosis
    n 1: a disorder characterized by deposit of amyloid in organs or
         tissues; often secondary to chronic rheumatoid arthritis or
         tuberculosis or multiple myeloma