Crossword Genius

Thin item of laboratory glassware able to withstand high temperatures (4,4)

Ross

I believe the answer is:

test tube

(Other definitions for test tube that I've seen before include "'Laboratory glass cylinder (4,4)'" , "used by chemist" , "Item used in chemical reactions" , "useful for experiment" , "Container for precipitation" .)

I've seen this clue in The Mirror.
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