For the chromosomal formation, see meiosis.

Tetris blocks.

For the tetrad or vierbein theory in differential geometry, see moving frame.

For the tetrad analysis in genetics, see tetrad (genetics).

For the polyomino, see tetromino.

For the music theory concept, see tetrad (music).

For Marshall McLuhan's four laws of media, see tetrad of media effects.

For Karl Popper's tetradic schema of the growth of theories, see Karl Popper's Philosophy of Science.

For the General Relativity related topic, see Tetrad Formalism.

The Pythagorean symbol representing justice. See Tetrad (symbol)