tankage

noun

1. the capacity of a tank or tanks.
2. the act or process of storing liquid in a tank.
3. the fee charged for such storage.
4. the residue from tanks in which carcasses and other offal have been steamed and the fat has been rendered, used as a fertilizer.

noun

1. the capacity or contents of a tank or tanks
2. the act of storing in a tank or tanks, or a fee charged for such storage
3. agriculture
   1. fertilizer consisting of the dried and ground residues of animal carcasses
   2. a protein supplement feed for livestock