The term 'economic curve' refers to a graph that shows the relationship between two variables, such as price and quantity. The crossword solution for the term is 'DEMAND, ' which is an economic concept that describes the amount of a good or service that consumers are willing to purchase at a given price. DEMAND is one of the most important factors in determining the price of a good or service, and it is often represented by a downward-sloping curve on an economic graph.