Word Study
tetracolon |
tetracoralla |
tetractinellid |
tetractinellida |
tetracycline |
Tetrad
| tetradactyl
| tetradactyle
| tetradactylous
| tetradecane
| tetradecanoic acid
Tetrad
WORDNET DICTIONARY
Noun Tetrad has 1 sense
- tetrad(n = noun.quantity) 4, four, foursome, iv, little joe, quadruplet, quartet, quatern, quaternary, quaternion, quaternity - the cardinal number that is the sum of three and one; Array is a kind of digit, figure
CIDE DICTIONARY
Tetrad, n. [L. tetras, -adis, Gr. , : cf. F. tétrade.].
- The number four; a collection of four things; a quaternion. [1913 Webster]
- A tetravalent or quadrivalent atom or radical; as, carbon is a tetrad. [1913 Webster]
OXFORD DICTIONARY
Tetrad, n.
1 a group of four.
2 the number four.
1 a group of four.
2 the number four.
Etymology
Gk tetras -ados (as TETRA-)
ROGET THESAURUS
Tetrad
Four
N quaternity, four, tetrad, quartet, quaternion, square, quarter, tetract, tetragon, quadrangle, rectangle, tetrahedron, quadrature, quadrifoil, quadriform, quadruplet, quatrefoil, tetrapod, quadrangle, quad, quadrupole, quadrivium, four, quaternary, quaternal, quadratic, quartile, tetract, tetractic, tetractinal, tetrad, tetragonal, square, quadrate, quaternity, four, tetrad, quartet, quaternion, square, quarter, tetract, tetragon, quadrangle, rectangle, tetrahedron, quadrature, quadrifoil, quadriform, quadruplet, quatrefoil, tetrapod, quadrangle, quad, quadrupole, quadrivium, four, quaternary, quaternal, quadratic, quartile, tetract, tetractic, tetractinal, tetrad, tetragonal, square, quadrate.
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