Is DIMER a Wordle Word?

Yes. DIMER is a valid Wordle word.

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

What does DIMER mean?

/ˈdaɪmə(ɹ)/

A molecule consisting of two identical halves, formed by joining two identical molecules, sometimes with a single atom acting as a bridge.

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

Starter word rating: AverageIn the top 20% of all valid Wordle words for testing common letters.
Vowels: I, E
Unique letters: 5 of 5
Common letters: I, E, R

Hard-mode trap: 6 valid words fit the pattern DI_ER. 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.