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tetrad in Wiktionary, the free dictionary.
Tetrad ('group of 4') or tetrade may refer to:
Tetrad (area) , an area 2 km x 2 km square
Tetrad (astronomy) , four total lunar eclipses within two years
Tetrad (chromosomal formation)
Tetrad (general relativity) , or frame field
Tetrad (geometry puzzle) , a set of four simply connected disjoint planar regions in the plane
Tetrad (meiosis) , the four cells produced by meiotic cell division
Tetrad (music) , a set of four notes
Tetrad (symbol) , or tetractys, a triangular figure of ten points arranged in four rows, and mystical symbol
Medical tetrad , a group of four signs or symptoms which characterise a specific medical condition
Nibble , or tetrade, a 4-bit group
a
tuple of length 4
Tetrad Islands , in the Antarctic
See also
Topics referred to by the same term