ND

ND, Nd, nD, nd, or n.d. can mean:

Places

• North Dakota, a state in the United States
• Notre Dame, for a number of churches and colleges

Science and medicine

• Doctor of Naturopathic Medicine, an academic degree in naturopathic medicine
• Non-Distended, particularly in reference to abdominal distension during a clinical examination in medicine
• NADH dehydrogenase, an enzyme that catalyzes the transfer of electrons from NADH to coenzyme Q
• Neodymium, an element with the symbol "Nd"
• n_D, the refractive index of a medium at a wavelength of 589.29 nm (the Fraunhofer "D" line)
• Contax N Digital, a digital SLR camera made by Contax

Politics

• New Democracy (Canada), a former political party in Canada
• New Democracy (Greece), one of the main center-right liberal political parties in Greece

Creative work

• Napalm Death, a pioneering grindcore band from England
• Napoleon Dynamite, a 2004 independent film
• No Doubt, a ska band from the United States
• Nuclear Dawn, a mod for the game Half-Life 2
• nD, a type of alien from the United Kingdom TV series Invasion Earth.

Other

• Nd (digraph), a digraph present in many African languages
• National Diploma, an academic qualification in the Republic of Ireland
• Neutral density filter, a type of filter used in photography
• Negligent discharge, an accidental discharge of a firearm involving culpable carelessness
• Norsk Data, a defunct Norwegian computer manufacturer
• Nuclear disarmament, the dismantlement and proposed dismantling of nuclear weapons
• n.d., "no date" in bibliographies
• No Doubt, an award winning band from Anaheim