Sulfur
/sˈʌlfər/
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Definition
(noun) A chemical element with atomic number 16, having a bright yellow color and characteristic smell, used commercially in a variety of products such as insecticides, black powder, and matchsticks.
Sentence Examples
Sulfur is used to make matches.
Sulfur burns with a blue flame.
CEFR Practice Quiz
The yellow crystals of ____ were found near the opening of the volcano after the recent and mild eruption.