sub·re·gion 
(sŭbrē′jən)
(sŭbrē′jən)n.
A subdivision of a region, especially an ecological region.
subre′gion·al adj.
- intracerebrally
- in tracks
- Intracoastal Waterway
- intracompany
- intracranial
- intracranially
- intractability
- intractable
- intractableness
- intractably
- intracutaneous
- intracutaneously
- intracytoplasmic
- intraday
- intradermal
- intradermally
- intradermal test
- intrados
- intrafallopian
- intragalactic
- intramolecular
- intramolecularly
- intramural
- intramurally
- intramuscular