re·new·a·ble 
(rĭ-nə-bəl, -ny-)
(rĭ-nə-bəl, -ny-)adj.
1. Capable of being renewed: a renewable membership; renewable subscriptions.
2. Relating to or being a commodity or resource, such as solar energy or firewood, that is inexhaustible or replaceable by new growth.
re·new′a·bili·ty (-bĭlĭ-tē) n.
re·newa·bly adv.