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petrol
petrol blue
petrol station
petroleum
petroleum jelly
petrolhead
petrolic
petrology
petronel
petrophysics
petrosal
petrous
petticoat
pettifogger
pettifogging
petting
petting zoo
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petro-
petro-


prefix 
Definition:
 
1. rock, stone
petrography
2. petroleum
petrodollar
[< Greek petros "stone," petra "rock"]
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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