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prize ring
prizefight
prizewinner
PRO
pro (1)
pro (2)
pro (3)
pro- (1)
pro- (2)
pro-am
pro bono
pro-choice
pro-form
pro forma
pro forma invoice
pro jump
pro-life
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pro- (2)
pro-


prefix 
Definition:
 
1. rudimentary, precursor
prothrombin
2. before, earlier than
procambium
3. in front of
prothoracic
[Via French< Greek pro "in front, before" < Indo-European "forward, before"]
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