[ proh-fuh-lak-tik, prof-uh- ]
/ ˌproʊ fəˈlæk tɪk, ˌprɒf ə- /
defending or protecting from disease or infection, as a drug.
preventive or protective.
Medicine/Medical. a prophylactic medicine or measure.
a device, usually a rubber sheath, used to prevent conception or venereal infection; condom.
Words nearby prophylactic
Origin of prophylactic
OTHER WORDS FROM prophylacticpro·phy·lac·ti·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for prophylactically
/ (ˌprɒfɪˈlæktɪk) /
protecting from or preventing disease
protective or preventive
a prophylactic drug or device, esp a condom
Word Origin for prophylactic
C16: via French from Greek prophulaktikos, from prophulassein to guard by taking advance measures, from pro- ² + phulax a guard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medicine definitions for prophylactically
[ prō′fə-lăk′tĭk, prŏf′ə- ]
A prophylactic agent, device, or measure, such as a vaccine or drug.
A contraceptive device, especially a condom.
Acting to defend against or prevent something, especially disease; protective.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.