gate·house 
(gāthous′)
(gāthous′)n.
1. A lodge at the entrance to the driveway of an estate.
2. A fortified structure built over the gateway to a city or castle.
3. A building that houses the controls of a dam or canal lock.
gatehouse- magnetoencephalogram
- magnetoencephalographic
- magnetoencephalography
- magnetogram
- magnetograph
- magnetometer
- magnetometric
- magnetometry
- magnetomotive force
- magneton
- magnetooptics
- magnetopause
- magnetoresistance
- magnetoresistive
- magnetorheology
- magnetosphere
- magnetospheric
- magnetostriction
- magnetostrictive
- magnetotactic
- magnetotail
- magnetotaxis
- magnetron
- magnet school
- magnet therapy