interregional
adjective
in·ter·re·gion·al ˌin-tər-ˈrēj-nəl 
-ˈrē-jə-nᵊl
variants or less commonly inter-regional
: occurring between, or existing between two or more regions
interregional communication/trade
Word History
First Known Use
1871, in the meaning defined above
- Pacific plum
- Pacific rattlesnake
- Pacific red cedar
- Pacific Rim
- Pacific Rim National Park Reserve
- Pacific sailfish
- Pacific salmon
- Pacific sardine
- Pacific silver fir
- Pacific Standard Time
- Pacific terrapin
- Pacific time
- Pacific tree toad
- Pacific yellowtail
- Pacific yew
- Pacifica
- pacifical
- pacifically
- pacificated
- pacificates
- pacificating
- pacification
- pacifications
- requittals
- requoted