Pronunciation Prefix
  1. three
  • ter-
Related terms
  • tre-
  • ter-
  • -tri-
  • French: tri-
  • German: drei-, tri-
  • Italian: tri-
  • Portuguese: tri-
  • Russian: трёх-
  • Spanish: tri-
  1. (chemistry) Used in combination with a known element name (e.g. 'tri-silicon') to designate an unknown element that would reside three periods lower than the known element on a Mendeleev-type periodic table. See Mendeleev's predicted elements.
Related terms
  • eka-
  • dvi-

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