The Collaborative International Dictionary of English v.0.48:

amyloid \am"y*loid\ ([a^]m"[i^]*loid), Amyloidal \Am`y*loid"al\
   ([a^]m`[i^]*loid"al), a. [L. amylum starch + -oid.]
   Resembling or containing starch; starchlike. --AS

   Syn: starchlike, amylaceous
        [1913 Webster]

WordNet (r) 3.0 (2006):

amyloidal
    adj 1: resembling starch [syn: starchlike, amylaceous,
           amyloid, amyloidal, farinaceous]