Definition of phosphorus noun from the Oxford Advanced Learner's Dictionary

 

phosphorus

 noun
noun
BrE BrE//ˈfɒsfərəs//
 
; NAmE NAmE//ˈfɑːsfərəs//
 
[uncountable](symbol P)
 
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a chemical element. Phosphorus is found in several different forms, including as a poisonous, pale yellow substance that shines in the dark and starts to burn as soon as it is placed in air. Word Origin late 17th cent.: from Latin, from Greek phōsphoros, from phōs ‘light’ + -phoros ‘-bringing’.
See the Oxford Advanced American Dictionary entry: phosphorus