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passivity
passkey
Passover
passport
password
past (1)
past (2)
past master
past participle
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passive immunity
pas·sive im·mu·ni·ty


noun 
Definition:
 
immunity obtained from external source: immunity from disease acquired by the transfer of antibodies from one person to another, e.g. through injections or between a mother and a fetus through the placenta
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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