Preparative

a. [It. & Sp. preparativo, Fr. préparatif.] Tending to prepare or make ready; having the power of preparing, qualifying, or fitting for any thing; preparatory. He spent much time in quest of knowledge preparative to this work. South.

n. 1. That which has the power of preparing, or previously fitting for a purpose; that which prepares. “A preparative unto sermons.” Hooker. 2. That which is done to prepare; preparation. “Necessary preparatives for our voyage.” Dryden.