coccidiostat
noun
coc·cid·io·stat
| \ (ˈ)käk-ˈsid-ē-ō-ˌstat
\
\
Medical Definition of coccidiostat
: a chemical agent added to animal feed (as for poultry) that serves to retard the life cycle or reduce the population of pathogenic coccidia to the point that disease is minimized and the host develops immunity