Is TRIAC a Wordle Word?

Yes. TRIAC is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does TRIAC mean?

A three-terminal electronic component that conducts current in either direction when triggered; a bidirectional triode thyristor.

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: GoodIn the top 7% of all valid Wordle words for testing common letters.
Vowels: I, A
Unique letters: 5 of 5
Common letters: T, R, I, A

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.