pro·phy·lac·tic
adj. Acting to defend against or prevent something, especially disease; protective.
What does the word prophylactically mean?
Prophylactic: A preventive measure. The word comes from the Greek for "an advance guard," an apt term for a measure taken to fend off a disease or another unwanted consequence. A prophylactic is a medication or a treatment designed and used to prevent a disease from occurring.
How do you use prophylactically in a sentence?
It can be used as needed or prophylactically during times of increased stress that may provoke symptoms. Peripheral iridectomy is performed in cases of angle closure glaucoma, both in the affected eye and prophylactically in the other eye.