Related Clues:

• Encyclopedia reader from A to Z, say
• Computer geek
• Aloof one
• Word coined by Dr. Seuss
• Teen outcast
• Solitary soul
• Unhip sort
• Isolationist
• Geeky one
• Geek
• Hardly an extrovert
• Whom a bully may bully
• Mathlete, perhaps
• Square sort
• Uncool fellow, stereotypically