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phytotoxic
phytotoxin
phytotron
PI
pi (1)
pi (2)
pi bond
pi-dog
pi meson
PIA
pia
pia mater
Piacenza
piacular
piaffe
piani
pianism
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pi meson
pi mes·on


noun 
Definition:
 
nuclear physics 
Same as  pion
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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