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psoralen
psoriasis
psst
PST
PSTN
PSV
psych
psych-
psych.
psych out
psych up
Psyche
psyche
psyched
psychedelia
psychedelic
psychiatric
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psycho-
psycho-


prefix 
Definition:
 
1. mind, mental
psychoactive
2. psychology, psychological
psychobabble
[< Greek psukhē (see psyche)]
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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