Definitions for "Superabundant"
Abounding to excess; being more than is sufficient; redundant; as, superabundant zeal.
most excessively abundant
Keywords:  nordhaus, infinitely, notice, try, lot
(p. 29) Nordhaus uses superabundant to mean infinitely available at a given price. Notice, this does not mean that the goods are free, just that you can get as much as you like for a given price. This is in contrast to the normal situation where you might expect price to rise as you try to get a lot more of something.