1. Cannot be divided without leaving a remainder
   - indivisible by

See also: indivisible

• old-womanish
• old-world
• olde worlde
• olden
• Oldenburg
• older
• Oldfield
• oldie
• oldish
• oldness
• oldster
• oldtimer
• Olduvai Gorge
• oldwench
• oldwife
• ole
• Olea
• Olea cunninghamii
• Olea europaea
• Olea lanceolata
• Oleaceae
• oleaceous
• oleaginous
• oleaginousness
• Oleales