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propeller shaft
propelling pencil
propene
propenoic acid
propensity
proper
proper adjective
proper fraction
proper motion
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property
property center
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prophylactic
pro·phy·lac·tic [ prfə láktik, pròffə láktik ]


adjective 
Definition:
 
protecting against disease: protecting against infection or disease


noun  (plural pro·phy·lac·tics)
Definition:
 
1. health 
Same as  condom
2. drug that guards against disease: a drug or agent that prevents the development of disease
[Late 16th century. Via French prophylactique< Greek prophulaktikos prophulassein, literally "keep guard in front of" < phulassein "to guard"]

pro·phy·lac·ti·cal·ly adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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