phosphorus

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

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This entry was last updated on RefTopia from its source on 3/20/2012.