Definition of petro:
(n) :
A transliteration of the Carpathian Rusyn, Pannonian Rusyn, or Ukrainian male given name Петро (Petro), equivalent to Peter.
(n) :
A surname.
(n) :
In Haitian voodoo, a class of loa of uncertain origin, chiefly associated with fierceness or aggression.
(n) :
A Venezuelan cryptocurrency launched in 2018, supposed to be backed by the country's oil and mineral reserves. Symbol: ₽.