wow this things is really cool, it is possible to create extra section for specific game ? since too much time i want to create a TGM explanation site, but i'm to bad and have no time to build my "own" website interface... and the open system of the wiki is very good for cooperation...
oh it's very possible go nuts adding stuff if you like, other people will edit to correct any mistakes
tetromino is the worldwide standard mathematical term. tetrimino is henk roger's own creation. take your pick
tetromino - mathematicians tetrad - early official games tetramino - The New Tetris through before Tetris Worlds tetrimino - anything with SRS piece - generic name, where a "block" is 1/4 of a piece quad - Lumines (which uses O tetrominoes that are colored light or dark per block)