What are the blocks in Tetris called?

There are few things more satisfying than locking in that perfect piece and clearing a few lines in Tetris.

Originally developed in the '80s, we can thank Nintendo for bringing this game into our lives — for the original Game Boy alone, it sold over 35 million copies. But after licensing rights reverted back to developer Alexey Pajitnov, it went on to become the Guinness record holder for the most ported video game, available on over 65 platforms.

So yeah, you've probably played Tetris in one form or another. But did you know that those little blocks actually have a name? What are they called?

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