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This clue last appeared in the NYT Crossword on Saturday, 20 September 2025.

___ acid (staining agent used in electron microscopy)

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microscopystainingelectron

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This clue appeared in the NYT Crossword on Saturday, 20 September 2025. The answer OSMIC is a 5-letter entry.

What is the answer to "___ acid (staining agent used in electron microscopy)"?: OSMIC
How many letters is the answer to "___ acid (staining agent used in electron microscopy)"?: The answer has 5 letters.
When was this clue last seen?: This clue last appeared in the NYT Crossword crossword on Saturday, 20 September 2025.
Has this crossword clue appeared before?: This appears to be a rare or unique clue.

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