1. Any notation for the representation of numbers
   - number system, number representation system, system of numeration

Type of: mathematical notation

• hornets' nest
• Horney
• hornfels
• horniness
• hornist
• hornless
• hornlike
• hornpipe
• war-worn
• waratah
• warble
• warble fly
• warbler
• Warburg
• ward
• ward off
• ward-heeler
• warden
• wardenship
• warder
• wardership
• wardress
• wardrobe
• wardroom
• wardship