1. (physics) having dimension zero; expressable as a pure number not needing any units
   "any ratio of masses is dimensionless"

Encyclopedia: Dimensionless

• coin
• coin bank
• coin blank
• coin box
• coin collecting
• coin collection
• coin collector
• coin machine
• coin silver
• coin slot
• coin-operated
• coinage
• coincide
• centralization
• centralize
• centralized
• centralizing
• centrally
• Centranthus
• Centranthus ruber
• centrarchid
• Centrarchidae
• centre
• centre bit
• centre field