ex par·te /'eks-'pär-tē, -tā/ adv or adj [Medieval Latin, on behalf (of)]: on behalf of or involving only one party to a legal matter and in the absence of and usu. without notice to the other party
an ex parte motion
relief granted ex parte
— used in citations to indicate the party seeking judicial relief in a case
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.