1. An Asian river that rises in the Altai Mountains in northern China and flows generally northwest to become a tributary of the Ob River
   - Irtish, Irtysh, Irtysh River

Type of: river

Part of: Siberia

• subtracter
• subtraction
• subtractive
• subtrahend
• subtreasury
• subtropic
• subtropical
• subtropics
• subtype
• Subularia
• Subularia aquatica
• subulate
• subunit
• suburb
• suburban
• suburban area
• suburbanise
• suburbanised
• suburbanite
• suburbanize
• suburbanized
• suburbia
• subvent
• subvention
• subversion