1. Relating to or involving arithmetic
   "arithmetical computations"
   - arithmetic

See also: arithmetic

• obviate
• obviating
• obviation
• obvious
• obviously
• obviousness
• oca
• ocarina
• Occam
• Occam's Razor
• occasion
• occasional
• occasionalism
• occasionally
• occasions
• occident
• occidental
• occidentalise
• occidentalism
• occidentalize
• occipital
• occipital bone
• occipital cortex
• occipital gyrus
• occipital lobe