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Definition of Tetrad
1. Noun. The cardinal number that is the sum of three and one.
Exact synonyms: 4, Four, Foursome, Iv, Little Joe, Quadruplet, Quartet, Quatern, Quaternary, Quaternion, Quaternity
Generic synonyms: Digit, Figure
Generic synonyms: Digit, Figure
Definition of Tetrad
1. n. The number four; a collection of four things; a quaternion.
Definition of Tetrad
1. a group of four [n -S] : TETRADIC [adj]
Medical Definition of Tetrad
1. A group of four, four pollen grains remaining fused together at maturity. (09 Oct 1997)