'Tankage' definitions:

Definition of 'tankage'

From: WordNet
noun
The quantity contained in (or the capacity of) a tank or tanks
noun
The charge for storing something in tanks
noun
The act of storing in tanks

Definition of 'Tankage'

From: GCIDE
  • Tankage \Tank"age\, 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.]