Is TEALS a Wordle Word?

Yes. TEALS is a valid Wordle word.

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

Plurals ending in S are almost never chosen as Wordle answers.

What does TEALS mean?

Any of various small freshwater ducks of the genus Anas that are brightly coloured and have short necks.
A dark, somewhat bluish-green colour; a dark cyan.

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

Starter word rating: ExcellentIn the top 1% of all valid Wordle words for testing common letters.
Vowels: E, A
Unique letters: 5 of 5
Common letters: T, E, A, L

Hard-mode trap: 14 valid words fit the pattern _EALS. If you reach it, you may need several guesses to find the last letter.

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.