Webster’s Revised Unabridged Dictionary · 1913
Placet
Pla′cet (plā′sĕt), n. [L. placet it pleases.] 1. A vote of assent, as of the governing body of a university, of an ecclesiastical council, etc.
2. The assent of the civil power to the promulgation of an ecclesiastical ordinance. Shipley.
The king . . . annulled the royal placet. J. P. Peters.