"Montor
Additional circuitry that McLane commands in addition to sleeping energy when approaching the "supernova".
[SPECULATION:]
The term does not appear in any available dictionary or dictionary. Either it is an additional boost, but this is unlikely since "Hyperspace plus sleeper" was previously described as a "hell of energy". Another possibility would be the derivation from lat. "Mons" = mountain. Then it could be a property of the drive, which causes a repulsion of matter and is used when starting or "climbing" from planets. That makes sense because you certainly don't want to land on this planet."