The term 'petty tyrant' refers to a person who exercises power in an oppressive and tyrannical manner. The crossword solutions for this term are 'SATRAP' (6 letters) and 'MARTINET' (8 letters). A SATRAP was a governor of a province in the ancient Persian Empire, while a MARTINET is a strict disciplinarian who enforces rules and regulations with an iron fist. Both terms refer to people who exercise power in an oppressive and tyrannical manner, making them synonymous with the term 'petty tyrant'.