The Collaborative International Dictionary
Supplicat
Supplicat \Sup"pli*cat\, n. [L., he supplicates.] (Eng. Universities) A petition; esp., a written one, with a certificate that the conditions have been complied with.
Wiktionary
supplicat
n. (context UK historical universities English) A petition, especially a written one, with a certificate that the conditions have been comply with.