Dictionary.com
Thesaurus.com

epiphylaxis

American  
[ep-uh-fahy-lak-sis, -fi-] / ˌɛp ə faɪˈlæk sɪs, -fɪ- /

noun

Medicine/Medical.
  1. reinforcement of the defenses of the body against disease.


Etymology

Origin of epiphylaxis

< New Latin < Greek epi- epi- + phýlaxis a watching, guarding