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ND may refer to:

In arts and entertainment[edit]

  • Nancy Drew, a character in the series of books and video games with the same name
  • Naughty Dog, an American video game developer
  • Nuclear Dawn, a mod for the game Half-Life 2
  • nD, a type of alien in the United Kingdom TV series Invasion Earth




In politics[edit]

In science and technology[edit]

In medicine[edit]

In physics[edit]

In mathematics[edit]

Other uses in science and technology[edit]

  • Neighbor Discovery Protocol, an Internet protocol
  • Neodymium, an element with the symbol "Nd"
  • Neutral density filter, a type of filter used in photography
  • Contax N Digital, a digital camera
  • no date, "...there is no date and no author, your text citation would include the title (or short title) "n.d." for no date, and paragraph number (e.g., "Heuristic," n.d., para. 1). The entry in the reference list might look something like this: Heuristic. (n.d.). In Merriam-Webster’s online dictionary (11th ed.)"[1]
  • ND for Nominal Diameter in piping
  • ND MX-5 Miata, the fourth generation of the Mazda MX-5

Other uses[edit]


  1. ^ APA Style. "How do you cite website material that..."