/suy'kleuh fos"feuh muyd', -mid, sik'leuh-/ , n. Pharm.
a synthetic, crystalline, toxic substance, C 7 H 15 Cl 2 N 2 O 2 P, related to nitrogen mustard, used in the treatment of Hodgkin's disease, lymphoma, and certain leukemias. Abbr.: CYC
[ 1955-60; CYCLO- + PHOSPH- + AMIDE ]