14-letter words containing p, a, r, o
- rip-off artist — a person who steals, cheats or swindles
- rna polymerase — an enzyme that synthesizes the formation of RNA from a DNA template during transcription.
- road transport — transport by road
- roanoke rapids — a city in NE North Carolina.
- rock partridge — the Greek partridge; Alectoris graeca
- roentgenograph — roentgenogram.
- roentgenopaque — not permitting the passage of x-rays.
- rogue elephant — a vicious elephant that has been exiled from the herd.
- roller caption — caption lettering that moves progressively up or across the picture, as for showing the credits at the end of a programme
- roman alphabet — Latin alphabet.
- röntgenography — radiography
- rotary printer — a machine for printing from a revolving cylinder, or a plate attached to one, usually onto a continuous strip of paper
- route flapping — flapping router
- rsa encryption — (cryptography, algorithm) A public-key cryptosystem for both encryption and authentication, invented in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman. Its name comes from their initials. The RSA algorithm works as follows. Take two large prime numbers, p and q, and find their product n = pq; n is called the modulus. Choose a number, e, less than n and relatively prime to (p-1)(q-1), and find its reciprocal mod (p-1)(q-1), and call this d. Thus ed = 1 mod (p-1)(q-1); e and d are called the public and private exponents, respectively. The public key is the pair (n, e); the private key is d. The factors p and q must be kept secret, or destroyed. It is difficult (presumably) to obtain the private key d from the public key (n, e). If one could factor n into p and q, however, then one could obtain the private key d. Thus the entire security of RSA depends on the difficulty of factoring; an easy method for factoring products of large prime numbers would break RSA.
- runoff primary — (especially in the southern U.S.) a second primary between the two leading candidates of the first primary to provide nomination by majority rather than by plurality.
- saffron powder — the dried stigmas of the saffron crushed into powder, used to flavour or colour food
- salt dome trap — A salt dome trap is an area where oil has been trapped underground by salt pushing upward.
- samuel gompers — Samuel, 1850–1924, U.S. labor leader, born in England: president of the American Federation of Labor 1886–94, 1896–1924.
- san pedro sula — a city in NW Honduras.
- sauropterygian — any of various Mesozoic marine reptiles of the superorder Sauropterygia, including the suborder Plesiosauria.
- scalar product — inner product (def 1).
- scapulohumeral — of, relating to, or involving the scapula and humerus.
- scorpion grass — either of two small Old World plants, Myosotis sylvatica or M. scorpioides, of the borage family, having a light-blue flower commonly regarded as an emblem of constancy and friendship.
- scrape through — only just succeed
- self-important — having or showing an exaggerated opinion of one's own importance; pompously conceited or haughty.
- self-operating — automatic.
- self-operative — automatic.
- self-parodying — given to or involving self-parody
- semipolar bond — type of chemical bond
- senior partner — high-ranking firm partner
- sergiyev posad — a city in the NW Russian Federation in Europe, NE of Moscow.
- serra junipero — Miguel José [mee-gel haw-se] /miˈgɛl hɔˈsɛ/ (Show IPA), 1713–84, Spanish Roman Catholic missionary to the Indians in California and Mexico.
- sharptail mola — a fish, Masturus lanceolatus, related to the ocean sunfish but having a pointed tail.
- sheepback rock — roche moutonnée.
- sheepdog trial — a competition in which sheepdogs are tested in their tasks
- shoe repairing — the trade of mending shoes
- shooting party — a social gathering when people shoot game together
- shortleaf pine — a pine, Pinus echinata, of the southern U.S., having short, flexible leaves.
- shoulder patch — a cloth emblem worn on the upper part of a sleeve of a uniform typically as identification of the organization to which the wearer is assigned.
- shoulder strap — a strap worn over the shoulder, as to support a garment.
- shropshire lad — a volume of poetry (1896) by A. E. Housman.
- singular point — a point at which a given function of a complex variable has no derivative but of which every neighborhood contains points at which the function has derivatives.
- siphonapterous — belonging or pertaining to the insect order Siphonaptera, comprising the fleas.
- soapbox orator — a person who makes a speech on, or as if on, a soapbox
- social chapter — The social chapter is an agreement between countries in the European Union concerning workers' rights and working conditions.
- social process — the means by which culture and social organization change or are preserved.
- solvay process — a process for manufacturing sodium carbonate whereby a concentrated solution of sodium chloride is saturated with ammonia, carbon dioxide is passed through it, and the product is calcined.
- source program — an original computer program written by a programmer that is converted into the equivalent object program, written in machine language, by the compiler or assembler
- south portland — a city in SW Maine.
- space platform — space station.