tri-

Fetched 2026-11-04 (live).

Datamuse reports no synonyms or antonyms for this word.

Prefix

1. Three.
2. Used for the digit three to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.
   • ‎un- (“1”) + ‎bi- (“2”) + ‎tri- (“3”) + ‎-ium (element suffix) → ‎unbitrium (“element 123”)

Prefix

1. Used in combination with a known element name (e.g. 'tri-silicon', 'tri-lead') 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.

Source: Wiktionary · CC BY-SA 3.0 (Wiktionary) · cached copy, not a rewrite.