mid·stream 
(mĭdstrēm′)
(mĭdstrēm′)n.
1. The middle part of a stream.
2. The part of a course that is neither at the beginning nor at the end: the midstream of life.
- orthodontic
- orthodontically
- orthodontics
- orthodontist
- orthodonture
- orthodonture
- orthodox
- Orthodox Church
- Orthodox Judaism
- orthodoxly
- orthodox sleep
- orthodoxy
- orthoepic
- orthoepical
- orthoepist
- orthoepy
- orthogenesis
- orthogenetic
- orthogenetically
- orthogonal
- orthogonality
- orthogonally
- orthogonal projection
- orthograde
- orthographer