phylactic

[fi-lak-tik]

adjective

defending or protecting, especially from disease.

Origin of phylactic

1700–10; < Greek phylaktikós preservative, equivalent to phylakt(ós) guarding (verbid of phylássein to guard) + -ikos -ic. See prophylactic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019