Not basic, in chemistry

The answer to “Not basic, in chemistry” in the The Washington Post crossword is ACIDIC — a 6-letter word. It most recently appeared in the The Washington Post crossword on September 1, 2026, a Tuesday puzzle, at 10-Down. Below you'll find why that fill fits, every other answer we've recorded for this clue, and links into the puzzle it came from.

“Not basic, in chemistry” answer

ACIDIC (6 letters)

Reveal the solution one letter at a time with the tiles above if you'd rather nudge yourself toward it than see the whole word at once. Just want it outright? The answer is ACIDIC.

What does ACIDIC mean?

Reading the plain dictionary sense of ACIDIC is often the fastest way to see why it answers this clue.

When else has “Not basic, in chemistry” appeared?

The Washington Post reuses clues across dates, sometimes with a different answer depending on the grid. Here's where this exact clue has shown up, and what the answer was each time — handy when you're checking whether today's fill is the only one.

September 1, 2026 (most recent) → ACIDIC. We haven't indexed another appearance of this exact clue yet.

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