Crossword Genius

As seen in chemistry class? (7)

Ross

I believe the answer is:

arsenic

(Other definitions for arsenic that I've seen before include "killer" , "Toxic metalloid element" , "Element No 33" , "As briefly identified" , "-- and Old Lace (play)" .)

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.