Merriam-Webster Collegiate Dictionary - commodity

 noun  (plural -ties)  Etymology: Middle English commoditee, from Anglo-French commoditee, from Latin commoditat-, commoditas, from commodus  Date: 15th century  1. an economic good: as  a. a product of agriculture or mining  b. an article of commerce especially when delivered for shipment commodities futures  c. a mass-produced unspecialized product ~ chemicals ~ memory chips  2.  a. something useful or valued that valuable ~ patience; also thing, entity  b. convenience, advantage  3. obsolete quantity, lot  4. a good or service whose wide availability typically leads to smaller profit margins and diminishes the importance of factors (as brand name) other than price  5. one that is subject to ready exchange or exploitation within a market stars as individuals and as commodities of the film industry — Film Quarterly