Crossword clue

“___ acid (staining agent used in electron microscopy)”

This clue appeared as 53-Across in the NYT Crossword on Saturday, September 20, 2025. The answer has 5 letters.

Answer · 5 lettersFirst appearance

OSMIC

Letters5

Starts withO

Ends withC

Vowels2

Where this clue has appeared

NYT Crossword
Sep 20, 20255 letters→

About this clue

The clue “___ acid (staining agent used in electron microscopy)” ran in the NYT Crossword on September 20, 2025 as 53-Across. Its answer is a 5-letter word that starts with O and ends with C.

See every answer from the puzzle on the NYT Crossword page for September 20, 2025, or learn how clues like this work in our guide to crossword clue types.

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FAQ

What is the answer to the “___ acid (staining agent used in electron microscopy)” clue?+

The answer is OSMIC (5 letters), from the NYT Crossword of September 20, 2025.

Where has this clue appeared?+

We have seen it 1 time in the NYT Crossword.

How do I find other NYT Crossword answers?+

Open the full list of answers for September 20, 2025, or browse every date on the NYT Crossword hub.