si quis

from The Century Dictionary.

• noun A public notice; specifically, in the Ch. of Eng., a notice publicly given in the parish church of a candidate for the diaconate or priesthood, announcing his intention to offer himself for ordination, and asking any one present to declare any impediment against his admission to orders.

from the GNU version of the Collaborative International Dictionary of English.

• (Ch. of Eng.) A notification by a candidate for orders of his intention to inquire whether any impediment may be alleged against him.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A notification by a candidate for Holy Orders of his intention to enquire whether any impediment may be alleged against him.