Is it ensure, insure, or assure?
1900, from zoonosis + -ic.
plural zoonoses, 1876, from comb. form of Greek zoion "animal" (see zoo) + nosos "disease."
zoonosis zo·on·o·sis (zō-ŏn'ə-sĭs, zō'ə-nō'-)n. pl. zo·on·o·ses (-sēz') A disease of animals, such as rabies or psittacosis, that can be transmitted to humans.