Issuable \Is"su*a*ble\, a. [From Issue.]

1. Leading to, producing, or relating to, an issue; capable of being made an issue at law. --Burrill.

2. Lawful or suitable to be issued; as, a writ issuable on these grounds.

Issuable plea (Law), a plea to the merits, on which the adverse party may take issue and proceed to trial.

Source: Webster's Revised Unabridged Dictionary (1913)