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Webster 1913 Edition

Noun.

[L.

placitum

. See

A decree or determination; a dictum.

[Obs.]

“The placits and opinions of other philosophers.”

Evelyn.

Noun.

[L. placitum, that which pleases, a decree, from placeo, to please.] A decree or determination. [Not in use.]

placit ‎(plural placits)

(obsolete) A decree or determination; a dictum.
The placits and opinions of other philosophers. — Evelyn.