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phosphorus
WIKTIONARY
phosphorus
Noun
  • a chemical element (symbol P) with an atomic number of 15, that exists in several allotropic forms. chemistry
  • any substance exhibiting phosphorescence; a phosphor obsolete
Phosphorus
Proper noun
  • A name sometimes used for Hesperus, the personification in Greek mythology of the planet Venus.
  • An ancient Greek name for the morning star (the planet Venus when it is visible in the eastern sky before sunrise).