extinct plants having tall arborescent trunks comparable to or more advanced than cycads
2
a disaster comparable to a nuclear meltdown
3
occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor n a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army n a European river
4
a senior noncommissioned officer in the Navy or Coast Guard with a rank comparable to master sergeant in the Army
5
a senior noncommissioned officer in the Air Force with a rank comparable to master sergeant in the Army
