Source : Webster's Revised Unabridged Dictionary (1913)

Myeloid \My"e*loid\, a. [Gr. ? marrow + -oid.]
   Resembling marrow in appearance or consistency; as, a myeloid
   tumor.

Source : WordNet®

myeloid
     adj 1: of or relating to bone marrow
     2: of or relating to the spinal cord