phosphorous
Phosphorous (adj) means relating to or containing phosphorus, especially in its less-oxidized chemical form. Example: “The lab handled the phosphorous compound with extra care.”
How to use phosphorous
Learner’s notesIn plain EnglishA technical adjective describing something that contains or relates to phosphorus.
Easy to confuse with the element name "phosphorus" (noun) — "phosphorous" is the adjective form.
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Can you complete this real example?
The lab handled the _____ compound with extra care.