say it: prah-fi-LAK-tik
prophylactic is an adjective and noun meaning "capable of preventing conception or impregnation". It carries 5 recorded senses.
capable of preventing conception or impregnation
“contraceptive devices and medications”
warding off
“the swastika...a very ancient prophylactic symbol occurring among all peoples”
preventing or contributing to the prevention of disease
“preventive medicine”
“vaccines are prophylactic”
“a prophylactic drug”
remedy that prevents or slows the course of an illness or disease
“the doctor recommended several preventatives”
contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for prophylactic come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.