Definition of "Petro"

Petro¹

noun
uncountable
1. In Haitian voodoo, a class of loa of uncertain origin, chiefly associated with fierceness or aggression.
  Quotations
  Whereas the Rada drumming and dancing are on beat, the Petro are offbeat, sharp, and unforgiving, like the crack of a rawhide whip.
  1985, Wade Davis, The Serpent and the Rainbow, Simon & Schuster, page 49

Petro²

proper noun
plural Petros
1. A surname.