phylactic

phy·lac·tic

[fi-lak-tik]
adjective
defending or protecting, especially from disease.

Origin:
1700–10; < Greek phylaktikós preservative, equivalent to phylakt(ós) guarding (verbid of phylássein to guard) + -ikos -ic. See prophylactic

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Phylactic is always a great word to know.
So is zedonk. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
the offspring of a zebra and a donkey.
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