A more thorough explanation:

Definition: In civil law, a pulsator is a plaintiff or actor.

Example: John filed a lawsuit against his former employer for wrongful termination. In this case, John is the pulsator.

Explanation: The term "pulsator" is used in civil law to refer to the person who initiates a legal action or lawsuit. In the example given, John is the pulsator because he is the one who filed the lawsuit against his former employer. The term is not commonly used outside of legal contexts.