Cera Impressa
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Lat. An impressed seal. It does not necessarily refer to an impression on wax, but may include an impression made on wafers or other adhesive substances capable of receiving an Impression or even paper.
Pierce v. Indseth, 106 U. S. 546, 1 Snp. Ct 418, 27 L. Ed. 254.