Lewis Short
ācrĭtūdo (noun F) : 2. acer
* The quality of acer, sharpness.
* Lit., of a fluid, Vitr. 2, 9, 12; 8, 3, 18 sq.
* Trop.
* Liveliness, vivacity, force: vigor et acritudo populi Romani,Gell. 10, 27: haut quisquam potis est tolerare acritudinem, Att. ap. Fest. p. 356 Müll. (Rib. Trag. Rel. p. 196).
* Harshness of character: morum,App. M. 9, 224.
Charlton T. Lewis, Charles Short, A Latin Dictionary