tetrad

Meaning

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

Hyphenated as
tet‧rad
Pronounced as (IPA)
/ˈtɛtɹæd/
Etymology

From Ancient Greek τετράς (tetrás), analysable as tetra- + -ad.

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