Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

Comprehensive
Dictionary Suite
Help
Help
Help
 
   
Display options
Show syllables
Show Lookup History
Double-Click Lookup
  Show Spanish support
 
Pronunciation
Wordsmyth
  Phonics
  IPA
 
Entry formats
Standard
  Classic
 
Lookup History
phosphorus

phos·pho·rus

phosphorus

pronunciation:
fas f rs
features:
Word Explorer, Word Parts
part of speech: noun
definition 1: a chemical element that has fifteen protons in each nucleus, that is found naturally only in compounds, esp. biologically essential compounds such as calcium phosphates and nucleotide phosphates, and that can be isolated in various allotropic forms, one of which is a poisonous whitish yellow solid that is luminous at room temperature because of slow oxidation. (symbol: P)
definition 2: any substance that is luminous because of slow oxidation or exposure to radiation of certain activating wave lengths; phosphorescent substance.
Word Explorer
See
  element
Word Parts
The word phosphorus contains the following part:
phor, -phore Greek root that means carry, bear