ratiocinium
From LSJ
Σκηνὴ πᾶς ὁ βίος καὶ παίγνιον: ἢ μάθε παίζειν, τὴν σπουδὴν μεταθείς, ἢ φέρε τὰς ὀδύνας → All life is a stage and a play: either learn to play laying your gravity aside, or bear with life's pains.
Latin > English (Lewis & Short)
rătĭōcĭnĭum: ii, n. id.,
I a reckoning, computation, Col. 5, 1 fin.; 5, 2, 6; 5, 11, 13; Cod. Th. 8, 1, 6: publica, ib. 9, 16, 2.—
II The obligation to render an account: imponere, Cod. 2, 7, 6 al.