| prophylactic treatment | The institution of measures designed to protect a person from an attack of a disease to which he has been, or is liable to be exposed. Synonym: preventive treatment. (05 Mar 2000) |
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| prophylactical | <medicine> Defending or preserving from disease; preventive. Origin: Gr, fr. To guard against; before + to guard: cf. F. Prophylactique. Source: Websters Dictionary (01 Mar 1998) |
| prophylaxis | The prevention of disease, preventive treatment. Origin: Gr. Prophylassein = to keep guard before (18 Nov 1997) |
| prophyll | A leaf formed at the base of a shoot, usually smaller than those formed subsequently. (09 Oct 1997) |