tris-

  1. Prefix.  (chemistry) (obsolete) A variant of tri- used to indicate that the component that does ''not'' take the prefix occurs three times in the compound: '''''tris'''phosphuret of copper'' is PCu'''3'''; '''tris'''benzeneazoresorcinol, C6H(OH)2(N2Ph)'''3'''. .
  2. Prefix.  (chemistry) A variant of tri-, used for substitutions of three complex rather than simple units, as in,.

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