19-letter words containing a, r, c, t, o, p
- nasty piece of work — malicious person
- natural catastrophe — A natural catastrophe is an unexpected event, caused by nature, such as an earthquake or flood, in which there is a lot of suffering, damage, or death.
- neuropathologically — In a neuropathologic way.
- non-contemporaneous — living or occurring during the same period of time; contemporary.
- nonplayer character — a character in a tabletop role-playing game who is controlled by the Game Master.
- north pacific ocean — the northern part of the Pacific Ocean, extending from the equator to the Arctic Ocean.
- not worth a crumpet — utterly worthless
- nuclear power plant — factory that generates atomic energy
- occupation grouping — a category in a system of classifying people according to occupation, based originally on information obtained by government census and subsequently developed by market research. The classifications are used by the advertising industry to identify potential markets. The groups are A, B, C1, C2, D, and E
- occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
- open-hearth furnace — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
- open-hearth process — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
- operations director — a director or senior manager who oversees the efficiency of business operations
- operations research — the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.
- optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- optical mark reader — (hardware) (OMR) A special scanning device that can read carefully placed pencil marks on specially designed documents. OMR is frequenty used in forms, questionnaires, and answer-sheets.
- orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- overhead projection — the projection (using an overhead projector) of an enlarged image of a transparency onto a surface above and behind the person using it
- pancreatic fibrosis — cystic fibrosis.
- parallel projection — a projection from one plane to a second plane in which the lines joining points on the first plane and corresponding images are parallel.
- parametric equation — one of two or more equations expressing the location of a point on a curve or surface by determining each coordinate separately.
- parasympathomimetic — having an effect similar to that produced when the parasympathetic nervous system is stimulated
- parathyroid extract — an aqueous preparation obtained from the parathyroid gland of cattle, used in medicine chiefly in cases of parathyroid deficiency and in veterinary medicine in the treatment of tetanic convulsions.
- parthenogenetically — development of an egg without fertilization.
- participatory sport — a sport in which people take part, (as opposed to a spectator sport)
- particle dispersoid — A particle dispersoid is a suspension of solid particles in a gas.
- particle separation — a rule that moves the particle of a phrasal verb, thus deriving a sentence like He looked the answer up from a structure that also underlies He looked up the answer
- particle technology — Particle technology is knowledge and study which relates to particles, and is used in industry.
- particular solution — a solution of a differential equation containing no arbitrary constants.
- party-column ballot — Indiana ballot.
- pastoral counseling — the use of psychotherapeutic techniques by trained members of the clergy to assist parishioners who seek help for personal or emotional problems.
- pattern recognition — the automated identification of shapes or forms or patterns of speech.
- paumotu archipelago — Tuamotu Archipelago.
- pedestrian crossing — place to cross road
- penecontemporaneous — formed during or shortly after the formation of the containing rock stratum: penecontemporaneous minerals.
- performance anxiety — the stage fright that a person feels when they are about to perform (a play, piece of music etc) in front of an audience
- performance targets — the expected or predicted success level of an individual, company or organization
- personal watercraft — a jet-propelled boat ridden like a motorcycle.
- phenylthiocarbamide — a crystalline, slightly water-soluble solid, C 6 H 5 NHCSNH 2 , that is either tasteless or bitter, depending upon the heredity of the taster, and is used in medical genetics and as a diagnostic.
- photographic memory — total recall
- photoreconnaissance — reconnaissance using aerial photography.
- pileated woodpecker — a large, black-and-white American woodpecker, Dryocopus pileatus, having a prominent red crest.
- pirates of penzance — an operetta (1879) by Sir William S. Gilbert and Sir Arthur Sullivan.
- pistachio ice cream — ice cream flavoured with pistachios
- plastic deformation — In plastic deformation a material changes shape when a stress is applied to it and does not go back to its original state when the stress is removed.
- pneumogastric nerve — the vagus nerve.
- pocket-handkerchief — handkerchief (def 1).
- poincare conjecture — Mathematics. the question of whether a compact, simply connected three-dimensional manifold is topologically equivalent to a three-dimensional sphere.
- police headquarters — building where police are stationed