To hear audio pronunciation of this topic, purchase a subscription or log in.

1. A pattern or form used to make a replica, as a cast or impression of teeth in dentistry.
2. A person or thing worthy of imitation or emulation.
3. A diagram representing an idea, phenomenon, or statistical relationship among variables.
4. A framework or system for organizing ideas and representing hypotheses or theories.
5. In artificial intelligence systems or machine learning, an algorithm.

There's more to see -- the rest of this topic is available only to subscribers.