The term BRAIN can be defined in a variety of ways, as evidenced by the crossword solutions provided. NOODLE is a six-letter word for brain, referring to the shape of the organ. INTELLECTUAL is a twelve-letter word that describes someone who is highly intelligent and knowledgeable. SCAN is a four-letter word that refers to the process of examining something closely. GENIUS is a six-letter word that is used to describe someone who is exceptionally talented or intelligent. NOGGIN is a six-letter word for head, which is where the brain is located. TRUSTER is a seven-letter word that refers to someone who has faith in their own mental abilities. EINSTEIN is an eight-letter word that is used to refer to Albert EINSTEIN, a famous scientist and mathematician. GRAYMATTER is a ten-letter word that is used to refer to the brain's gray matter, which is composed of nerve cells and their connections.