Sorb 
(sôrb)
(sôrb)n.
A member of a Slavic people inhabiting the region of Lusatia in eastern Germany and southwest Poland.
[German Sorbe, perhaps variant of Serbe, Serb, from Serbian Srb, Serb.]
- petro-
- petrochemical
- petrochemistry
- petrodollars
- petrogenesis
- petrogenetic
- petroglyph
- petroglyphic
- Petrograd
- petrographer
- petrographic
- petrographical
- petrographically
- petrography
- petrol
- petrolatum
- petroleum
- petroleum coke
- petroleum ether
- petroleum jelly
- petrolic
- petrologic
- petrological
- petrologically
- petrologist