23-letter words containing o, p, e, r, a, l

real simple syndication — (spelling) Illiterate form of Really Simple Syndication.
refinery waste disposal — Refinery waste disposal is the system for dealing with waste materials, especially hazardous ones, in a refinery.
refuse disposal service — a place or facility where rubbish and waste can be disposed
relative sunspot number — a number indicating the degree of sunspot activity on the sun as a factor of observer idiosyncrasies, the number of sunspot groups, and the number of individual sunspots.
respectability politics — the set of beliefs holding that conformity to socially acceptable or mainstream standards of appearance and behavior will protect a member of a marginalized or minority group from prejudices and systemic injustices: Black respectability politics perpetuate the fiction of a meritocracy in public education.
response generalization — generalization (def 4b).
response-generalization — the act or process of generalizing.
retrolental fibroplasia — an unusual eye disease occurring in premature infants, usually from being given high concentrations of oxygen, which causes abnormal formation of fibrous tissue behind the lens and often results in blindness.
reverse polish notation — postfix notation
rocky mountain beeplant — a rank-smelling plant, Cleome serrulata, of the caper family, native to the western U.S., having showy, dense clusters of pink or white flowers, frequented by bees.
schizotypal personality — a personality disorder characterized by a group of symptoms similar to but less severe than schizophrenia, as odd behavior, peculiar thinking, and social isolation.
self-addressed envelope — addressed to self
separation of variables — a grouping of the terms of an ordinary differential equation so that associated with each differential is a factor consisting entirely of functions of the independent variable appearing in the differential.
silicone breast implant — silicone filled bags that are implanted into a woman in order to increase the size of her breasts
social democratic party — History/Historical. a political party in Germany advocating a form of social organization based on the economic and political ideology of Karl Marx.
social security payment — a payment of social security made to an individual
sodium tripolyphosphate — a white powder, Na 5 P 3 O 1 0 , used as a water softener, sequestering agent, and food additive.
software developers kit — (jargon, product) (SDK, or "Software Development Kit") Software provided by a software vendor to allow their products to be used with those of other software vendors.
somaliland protectorate — official name of the former British Somaliland.
st. pierre and miquelon — two small groups of islands off the S coast of Newfoundland: an overseas territory of France; important base for fishing. 3 sq. mi. (240 sq. km). Capital: St. Pierre.
stereospecific catalyst — a catalyst for stereospecific chemical reactions
structural unemployment — unemployment caused by basic changes in the overall economy, as in demographics, technology, or industrial organization.
suprasegmental phonemes — phonemes or features of speech, as pitch, stress, and juncture, that may extend over and modify series of segmental phonemes
the metropolitan police — the police organization that is responsible for Greater London, excluding the City of London
the scottish parliament — the devolved national legislature of Scotland, located in Edinburgh
there'll be hell to pay — If you say there'll be hell to pay, you are emphasizing that there will be serious trouble.
to have a police record — If you say that somebody has a police record, you mean that they have committed a crime or crimes and the police have a record of this.
to keep your nose clean — If you keep your nose clean, you behave well and stay out of trouble.
to play for high stakes — to gamble on something very important
to pluck up the courage — If you pluck up the courage to do something that you feel nervous about, you make an effort to be brave enough to do it.
to win the popular vote — to get a majority as regards the votes cast by individual voters
transplantation antigen — a histocompatibility antigen identified by its effect on the rejection of transplanted cells or tissues.
triple expansion engine — (formerly) a steam engine in which the steam is expanded in three stages in cylinders of increasing diameter to accommodate the increasing volume of the steam
variable contrast paper — printing paper in which the contrast of the image is controlled by the color of the printing light.
virtual private network — (networking, security) (VPN) The use of encryption in the lower protocol layers to provide a secure connection through an otherwise insecure network, typically the Internet. VPNs are generally cheaper than real private networks using private lines but rely on having the same encryption system at both ends. The encryption may be performed by firewall software or possibly by routers. Link-level (layer 2 and 3) encryption provides extra protection by encrypting all of each datagram except the link-level information. This prevents a listener from obtaining information about network structure. While link-level encryption prevents traffic analysis (a form of attack), it must encrypt/decrypt on every hop and every path. Protocol-level encryption (layer 3 and 4) encryption encrypts protocol data but leaves protocol and link headers clear. While protocol-level encryption requires you to encrypt/decrypt data only once, and it encrypts/decrypts only those sessions that need it, headers are sent as clear text, allowing traffic analysis. Application (layer 5 up) encryption is based on a particular application and requires that the application be modified to incorporate encryption.
volumetric displacement — the volume of air per revolution that passes through a mechanical pump when the pressure at the intake and the exhaust is the same as that of the atmosphere
voyageurs national park — a national park in N Minnesota. 343 sq. mi. (888 sq. km).
wind cave national park — a national park in SW South Dakota. 41½ sq. mi. (107 sq. km).

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