1. The preventive treatment of disease.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• prophlaxis,
• prophalaxes,
• prophalaxis,
• prophylaxsis,
• prohylaxis,
• propholaxis,
• orophylaxis,
• lrophylaxis,
• -rophylaxis,
• prophylaxies,
• prophilaxis,
• prophylaxys,
• propylladiphenin,
• -prophylaxes,
• blapharophymosis,
• propylamin,
• prothalamis,
• propheaxis,
• prophylaktis,
• prophealaxis

• prophylactic,
• prophyll.

The adjective form of the word "prophylaxis" is "prophylactic".

The plural of the "prophylaxis" can be the "prophylaxes".

The singular of the "prophylaxis" can be the "prophylaxis".