16-letter words containing a, d, n
- norwegian buhund — a slightly-built medium-sized dog of a breed with erect pointed ears and a short thick tail carried curled over its back
- not worth a damn — worthless
- nuclear industry — the industry involving nuclear weapons, nuclear power stations, etc
- nuclear medicine — diagnostic and therapeutic medical techniques using radionuclides or radioisotopes.
- numbered account — a bank account whose owner is identified by a number for the purpose of preserving anonymity.
- nusslein-volhard — Christiane [kris-tee-ah-nuh,, kris-tyah-] /ˌkrɪs tiˈɑ nə,, krɪsˈtyɑ-/ (Show IPA), born 1942, German biologist: Nobel prize 1995.
- objective danger — a danger, such as a stone fall or avalanche, to which climbing skill is irrelevant
- observation deck — an area on a high building that is surrounded with railings or fencing and which provides panoramic views
- observation ward — a ward in a hospital where patients are monitored
- octanedioic acid — a colourless crystalline dicarboxylic acid found in suberin and castor oil and used in the manufacture of synthetic resins. Formula: HOOC(CH2)6COOH
- odds are against — If you say that the odds are against something or someone, you mean that they are unlikely to succeed.
- of human bondage — a novel (1915) by W. Somerset Maugham.
- of it own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
- oligodendroglial — Of or pertaining to the oligodendroglia.
- on a world scale — in a way that involves the whole world
- on her beam-ends — (of a vessel) heeled over through an angle of 90°
- on the bandwagon — on the popular or apparently winning side, as in an election
- on the beam-ends — tipping so far to the side as to be in danger of capsizing
- on the breadline — impoverished; living at subsistence level
- on the downgrade — waning in importance, popularity, health, etc
- on the safe side — as a precaution
- on the up and up — to, toward, or in a more elevated position: to climb up to the top of a ladder.
- on the up-and-up — to, toward, or in a more elevated position: to climb up to the top of a ladder.
- onboard computer — onboard a vehicle, ship, plane, train or spacecraft
- once and for all — former; having at one time been: the once and future king.
- one and the same — When two or more people or things are thought to be separate and you say that they are one and the same, you mean that they are in fact one single person or thing.
- one for the road — a long, narrow stretch with a smoothed or paved surface, made for traveling by motor vehicle, carriage, etc., between two or more points; street or highway.
- one's salad days — If you refer to your salad days, you are referring to a period of your life when you were young and inexperienced.
- one-armed bandit — slot machine (def 1).
- oneida community — a society of religious perfectionists established by John Humphrey Noyes, in 1848 at Oneida, N.Y., on the theory that sin can be eliminated through social reform: dissolved and reorganized in 1881 as a joint-stock company.
- operating budget — money allocated to a project
- orange marmalade — preserve made from oranges
- orange men's day — July 12, an annual celebration in Northern Ireland and certain cities having a large Irish section, especially Liverpool, to mark both the victory of William III over James II at the Battle of the Boyne, July 1, 1690, and the Battle of Augbrim, July 12, 1690.
- ordinary jubilee — the celebration of any of certain anniversaries, as the twenty-fifth (silver jubilee) fiftieth (golden jubilee) or sixtieth or seventy-fifth (diamond jubilee)
- ordnance factory — a factory that makes military weapons and ammunition
- organized labour — labour carried out by workers in trade unions, or the workers themselves
- oriental emerald — a green variety of corundum used as a gemstone
- orthodoxy sunday — a solemn festival held on the first Sunday of Lent (Orthodoxy Sunday) commemorating the restoration of the use of icons in the church (a.d. 842) and the triumph over all heresies.
- ostend manifesto — a declaration (1854) issued from Ostend, Belgium, by the U.S. ministers to England, France, and Spain, stating that the U.S. would be justified in seizing Cuba if Spain did not sell it to the U.S.
- oxidation number — the state of an element or ion in a compound with regard to the electrons gained or lost by the element or ion in the reaction that formed the compound, expressed as a positive or negative number indicating the ionic charge of the element or ion.
- paediatric nurse — a nurse who specializes in the care of children
- painted trillium — a North American trillium, Trillium undulatum, having white flowers streaked with pink or purple.
- panel discussion — a formal discussion before an audience for which the topic, speakers, etc., have been selected in advance.
- pantothenic acid — a hydroxy acid, C 9 H 1 7 O 5 N, found in plant and animal tissues, rice, bran, etc., that is part of the B complex of vitamins and is essential for cell growth.
- para-phenetidine — a colorless organic liquid, C 8 H 1 1 NO, used chiefly in its para form (para-phenetidine) in the synthesis of phenacetin, dyes, and other compounds.
- parallelepipedon — a prism with six faces, all parallelograms.
- partial ordering — a relation defined on a set, having the properties that each element is in relation to itself, the relation is transitive, and if two elements are in relation to each other, the two elements are equal.
- parts of lindsey — an area in E England constituting a former administrative division of Lincolnshire
- pass-band filter — band-pass filter
- passage to india — a novel (1924) by E. M. Forster.