libratio
Latin > English (Lewis & Short)
lībrātĭo: ōnis, f. libro.
I A making level, levelling: fortasse qui Archimedis libros legit, dicet non posse fieri veram ex aqua librationem, Vitr. 8, 6, 3.—
II A horizontal position, level: circa terrae librationem, Vitr. 6, 1, 5.—
III A hurling off, hurling, slinging, Diom. p. 473 P.