A neural network is a type of artificial intelligence that uses interconnected nodes to process information. The two crossword solutions for the term neural network are 'RETE' and 'PLEXUS'. RETE is a four-letter word meaning a network of intersecting blood vessels, nerves, or other channels. PLEXUS is a six-letter word meaning a complex network or interconnection of elements. Both words are used to describe the interconnected structure of a neural network.