Noun

(en noun)

(computing) Application programming interface.

(pharmacology) Active pharmaceutical ingredient.

Noun

(en noun)

One who, or that which, consumes.

* {{quote-book, year=2006, author=

, title=Internal Combustion , chapter=2 citation , passage=But through the oligopoly, charcoal fuel proliferated throughout London's trades and industries. By the 1200s, brewers and bakers, tilemakers, glassblowers, pottery producers, and a range of other craftsmen all became hour-to-hour consumers of charcoal.}}

(economics) someone who trades money for goods as an individual.

This new system favours the consumer over the producer.

(biology) an organism that uses other organisms for food in order to gain energy.