Necessitas

Lat. Necessity; a force, power or influence which compels one to act against his wlll. Calvin.

— Necessitas cnlpabilis. Culpable necessity; unfortunate necessity; necessity which, while it excuses the act done under its compulsion, does not leave the doer entirely free from blame. The necessity which compels a man to kill another in self-defense is thus distinguished from that which requires the killing of a felon. See 4J Bl. Comm. 187.

— Trinoda necessitas. In Saxon law. The threefold necessity or burden; a term used to denote the three things from contributing to the performance of which no lands were exempted, viz., the repair of bridges, the building of castles, and military service against an enemy. 1 Bl. Comm. 263, 357.