tetrad

  1. Noun.  A group of four things.
  2. Noun.  (chemistry) A tetravalent atom or radical.
  3. Noun.  (biology) Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.

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This entry was last updated on RefTopia from its source on 3/20/2012.