What is the answer to "Petri dish substance" in the WSJ Crossword?

The answer to the WSJ Crossword clue "Petri dish substance" is AGAR (4 letters).

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WSJ

Petri dish substance WSJ Crossword Clue

Across clue · from the June 8, 2026 puzzle

Stuck on “Petri dish substance” from the Wall Street Journal Crossword? Here is the verified answer:

Answer

AGAR

4 letters · Across · last seen June 8, 2026

1AItalian island with namesake pants5 1DSecret stockpile5 2DUnpleasantly sharp to the taste5 3DStephen Hawking, for one9 4DOutdoorsy retailer3 5D“___ it obvious?”4 6DTook care of5 6ABit of choreography4 7DBase of the binary system3 8DTwisty fish3 9DDownloaded form, often3 10ACore muscles, informally3