tetrads

There are 7 different shapes (also called tetrads), which are named by a letter depending on their shape: I, O, Z, S, T, L and J.

The Code Project Latest Articles Cedric Moonen 2008

π {p} closer than that in Archimedes's _Measurement of a Circle_; and possibly the book also contained Apollonius's exposition of his notation for large numbers according to 'tetrads' (successive powers of the myriad).

The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield Various

It turns out that Tetris colors have varied over the years, so I settled on matching the colors to the tetrads in the Free Tetris game online.

Boing Boing 2008

Marshall Mcluhan, author of ‘Understanding Media’ and ‘The Global Village’, has helped, along with others, to create the tetrads which aid inthe understanding how media and technology effect and alter our culture and ourselves by expanding our thoughts beyond the "figure".

Man and Media: The Chronology 2009

But since qinks only flew the mating dance in tetrads, two of them were always keeping an eye on the sky ahead at all times.

Diuturnity's Dawn Foster, Alan Dean, 1946- 2002

But since qinks only flew the mating dance in tetrads, two of them were always keeping an eye on the sky ahead at all times.

Diuturnity's Dawn Foster, Alan Dean, 1946- 2002

Before 700, Thessaly was organized into four tetrads, each ruled by a tetrarch.

e. Central and Northern Greece 2001

The theory of the macrocosm and the microcosm, set forth in Radulphus Glaber's Historia sui temporis (1059) inspired the equation of many tetrads — the cardinal virtues, the Rivers of Paradise, the Evangelists, the Latin Fathers, the Seasons.

Dictionary of the History of Ideas HELEN F. NORTH 1968

Astronomers likewise have a common ground for discussion with musicians in the harmony of the stars and musical concords in tetrads and triads of the fourth and the fifth, and with geometricians in the subject of vision (in Greek [Greek: logos optikos]); and in all other sciences many points, perhaps all, are common so far as the discussion of them is concerned.

The Ten Books on Architecture Vitruvius Pollio

The plenitude of Greatness is 2 tetrads, a decad and

The Catholic Encyclopedia, Volume 9: Laprade-Mass Liturgy 1840-1916 1913