zero-pressure balloon flying high above a very cold tropopause in tropical or summer midlatitudes. When the balloon cools and descends at night, its radiation temperature does not change, but its lift increases as it descends to the colder levels. The lost lift is overcome and the balloon floats at a lower altitude without the need for ballast. The flight altitude of the balloon is radiation- controlled.

a very greedy but clever animal he is an opportunist

A key management daemon. The magic behind the VPN power of m0n0wall. See Also http://www.kame.net/racoon/.

an omnivorous nocturnal mammal native to North America and Central America