One Piece Encyclopedia

Adam A legendary tree around which I a city taht was always in war was rised. It's said that this tree never fall without concerning how much bombs the launched. With the wood of this tree I am Gol D. Roger's ship was made, the Oro Jackson, and the second ship of the Straw Hats, the Thousand Sunny.
Akagami Akagami is the Japanese word equivalent to "Red Hair", it is the name by which is known Shanks pirate crew and the nickname of his captain.
Akuma no Mi "Devil Fruits" - They are strange fruits that grant the one who eats them powers but in return they lose the capacity to swim.
All Blue All Blue is a sea of legend, rumored to be the only place in the world where the North Blue, South Blue, East Blue, and West Blue seas meet. In this legendary ocean there are said to be fish from each of the seas. Sanji's dream is to find the All Blue which is said that it is located in the Grand Line.
Ama Kakeru Ryuu no Hizume "The hoof of the dragon that gallops the celestial" - is a cattle brand used by Tenryuubito to mark the slaves.
Aochari Aochari is the name of Aokiji's bike.
Aqua Laguna It is a flood that takes place every year in Water Seven. A slope of the tide is followed of an increase of this one. Every year the city sunks a litte more by the consecuences of the Aqua Laguna.