/suy'kleuh spawr"een, -in, -spohr"-, sik'leuh-/ , n. Pharm.
a substance, synthesized by certain soil fungi, that suppresses the immune response by disabling helper T cells, used to minimize rejection of foreign tissue transplants.
Also, cyclosporin /suy'kleuh spawr"in, -spohr"-, sik'leuh-/ .
[ 1975-80; Cyclospor ( eae ) a class of brown algae (see CYCLO-, -SPORE, -EAE) + -IN 2 ]