
1) Vote of assent
Found on
https://www.crosswordclues.com/clue/placet

Latin, meaning: it is agreed, it is resolved, it seems good.
Found on
http://archives.nd.edu/ppp.htm
[fictional planet] Placet is a fictional planet that appeared in the science fiction short story `Placet is a Crazy Place` by Fredric Brown, first published in the May 1946 issue of Astounding Science Fiction. Placet is composed of both ordinary and heavy matter. The core is made of the collapsed, heavy matter, giving the planet a gravity t...
Found on
http://en.wikipedia.org/wiki/Placet_(fictional_planet)

vote of assent in a governing body
Found on
http://phrontistery.info/p.html

• (n.) The assent of the civil power to the promulgation of an ecclesiastical ordinance. • (n.) A vote of assent, as of the governing body of a university, of an ecclesiastical council, etc.
Found on
http://thinkexist.com/dictionary/meaning/placet/
Pla'cet noun [ Latin
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 ...
Found on
http://www.encyclo.co.uk/webster/P/97

yes, approved, agreed
Found on
https://www.businessballs.com/glossaries-and-terminology/latin-terms-and-ph

it is agreed, it is resolved, it seems good.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.