- n. [药] 预防药；预防法；避孕用具
- adj. 预防疾病的
- prophylactic:  Prophylactic comes from Greek prophulaktikós, a derivative of the verb prophulássein. This meant literally ‘keep guard in front of a place’, and hence ‘take precautions against’. It was formed from the prefix pro- ‘before’ and phulássein ‘guard’.
- prophylactic (adj.)
- 1570s, originally of medicines, "that tends to prevent disease," from Middle French prophylactique (16c.) and directly as a Latinized borrowing of Greek prophylaktikos "precautionary," from prophylassein "keep guard before, ward off, be on one's guard," from pro- "before" (see pro-) + phylassein, Ionic variant of phylattein "to watch over, to guard," but also "cherish, keep, remain in, preserve" (see phylactery).
The noun is first recorded 1640s, "a medicine or treatment to prevent disease;" meaning "condom" is from 1943, replacing earlier preventive (1822), preventative (1901). Condoms originally were used more to thwart contagious disease than to prevent pregnancy.
- 1. Vaccination and other prophylactic measures can be carried out.
- 2. The region began to use quinine successfully as a prophylactic.
- 3. Prophylactic antibiotics are definitely contraindicated.
- 4. Can the how long after prophylactic of out of service be pregnant?
- 5. Prophylactic filtering operation may have benefit on preventing development of secondary glaucoma.
[ prophylactic 造句 ]