tetrad

Meanings

Plural: tetrads

Noun

• the cardinal number that is the sum of three and one
• A group of four things.
• Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
• A group of four haploid and immature pollen grains in tetrahedral fashion produced by meiotic microsporogenesis.
• A unit of land area of two by two (that is, four) square kilometres.
• A tetravalent atom or radical.
• A group of four basis vectors for a four-dimensional manifold in differential geometry.
• A chord comprised of four notes; a tetrachord.

Synonyms

4, four, foursome, IV, Little Joe, quadrad, quadruplet, quadruplicity, quartet, quatern, quaternary, quaternion, quaternity, tetrad, tetraplet