preventive

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preventive

1. Med
a. tending to prevent disease; prophylactic
b. of or relating to the branch of medicine concerned with prolonging life and preventing disease
2. (in Britain) of, relating to, or belonging to the customs and excise service or the coastguard
3. Med any drug or agent that tends to prevent or protect against disease
4. another name for contraceptive
References in classic literature ?
For myself, I have discovered an excellent preventive against sea- sickness, in balancing myself.
Accordingly, after a vast amount of moaning and crying upstairs, and much damping of foreheads, and vinegaring of temples, and hartshorning of noses, and so forth; and after most pathetic adjurations from Miggs, assisted by warm brandy-and-water not over-weak, and divers other cordials, also of a stimulating quality, administered at first in teaspoonfuls and afterwards in increasing doses, and of which Miss Miggs herself partook as a preventive measure (for fainting is infectious); after all these remedies, and many more too numerous to mention, but not to take, had been applied; and many verbal consolations, moral, religious, and miscellaneous, had been super-added thereto; the locksmith humbled himself, and the end was gained.
This repulsive pillow was her especial property, being used as a weapon of defense, a barricade, or a stern preventive of too much slumber.