tankage

n. 1. The act or process of putting or storing in tanks. [ Webster 1913 Suppl. ]

2. Fees charged for storage in tanks. [ Webster 1913 Suppl. ]

3. The capacity or contents of a tank or tanks. [ Webster 1913 Suppl. ]

4. (Agric.) Waste matter from tanks; esp., the dried nitrogenous residue from tanks in which fat has been rendered, used as a fertilizer. [ Webster 1913 Suppl. ]