1. The study of history, geography, civics, sociology, economics, and other social science subjects, especially in primary and secondary schools

Encyclopedia: Social studies

• triploid
• triply
• tripod
• tripodal
• tripoli
• tripos
• tripper
• trippet
• tripping
• trippingly
• trippy
• triptych
• Tripura
• triquetral
• triquetral bone
• triquetrous leek
• trireme
• trisaccharide
• trisect
• trisection
• triskaidekaphobia
• triskaidekaphobic
• triskele
• triskelion
• trismus