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17-letter words containing o, s, i, v

  • positive definite — (of a quadratic form) positive for all real values of the variables, where the values are not all zero.
  • positive electron — positron.
  • positive eugenics — the study of or belief in the possibility of improving the qualities of the human species or a human population, especially by such means as discouraging reproduction by persons having genetic defects or presumed to have inheritable undesirable traits (negative eugenics) or encouraging reproduction by persons presumed to have inheritable desirable traits (positive eugenics)
  • positive feedback — Electronics. the process of returning part of the output of a circuit, system, or device to the input, either to oppose the input (negative feedback) or to aid the input (positive feedback) acoustic feedback.
  • positive polarity — the grammatical characteristic of a word or phrase, such as delicious or rather, that may normally only be used in a semantically or syntactically positive or affirmative context
  • positive theology — a theological approach or tradition in which the nature of God is thought to be knowable and is understood through positive statements. See also cataphasis (def 2).
  • positive thinking — an optimistic attitude
  • prairie provinces — the Canadian provinces of Manitoba, Saskatchewan, and Alberta, which lie in the N Great Plains region of North America: the chief wheat and petroleum producing area of Canada
  • pre-investigation — the act or process of investigating or the condition of being investigated.
  • previous question — a move that a vote be taken at once on a main question, used especially as a means of cutting off further debate.
  • private ownership — the fact of being owned by a private individual or organization, rather than by the state or a public body
  • production values — the quality of a media production (such as a film) in regards to elements such as colours, quality, style, etc
  • progressive party — a political party formed in 1912 under the leadership of Theodore Roosevelt, advocating popular control of government, direct primaries, the initiative, the referendum, woman suffrage, etc.
  • protective system — protectionism (def 1).
  • pseudo-aggressive — characterized by or tending toward unprovoked offensives, attacks, invasions, or the like; militantly forward or menacing: aggressive acts against a neighboring country.
  • public television — a type of noncommercial, usually educational, television programming funded by the government, grants, viewers, and corporations. Compare educational television.
  • quantity surveyor — A quantity surveyor is a person who calculates the cost and amount of materials and workers needed for a job such as building a house or a road.
  • quasi-competitive — of, pertaining to, involving, or decided by competition: competitive sports; a competitive examination.
  • radioactive waste — the radioactive by-products from the operation of a nuclear reactor or from the reprocessing of depleted nuclear fuel.
  • recovery position — a position in which an unconscious person can be lain on the floor, which minimises them from further risk
  • recursive acronym — (convention)   A hackish (and especially MIT) tradition is to choose acronyms and abbreviations that refer humorously to themselves or to other acronyms or abbreviations. The classic examples were two MIT editors called EINE ("EINE Is Not Emacs") and ZWEI ("ZWEI Was EINE Initially"). More recently, there is a Scheme compiler called LIAR (Liar Imitates Apply Recursively), and GNU stands for "GNU's Not Unix!" - and a company with the name CYGNUS, which expands to "Cygnus, Your GNU Support". See also mung.
  • revascularization — the restoration of the blood circulation of an organ or area, achieved by unblocking obstructed or disrupted blood vessels or by surgically implanting replacements.
  • roving commission — authority or power given in a general area, without precisely defined terms of reference
  • rybinsk reservoir — a vast water reservoir in W central Russia on the River Volga and its tributaries Sheksna and Mologa, formed by Rybinsk Hydroelectric Station dam
  • saint bonaventure — Saint ("the Seraphic Doctor") 1221–74, Italian scholastic theologian.
  • saint croix river — Also called Santa Cruz. a U.S. island in the N Lesser Antilles: the largest of the Virgin Islands. 82 sq. mi. (212 sq. km).
  • saturation diving — a method of prolonged diving, using an underwater habitat to allow divers to remain in the high-pressure environment of the ocean depths long enough for their body tissues to become saturated with the inert components of the pressurized gas mixture that they breathe: when this condition is reached, the amount of time required for decompression remains the same, whether the dive lasts a day, a week, or a month.
  • second derivative — the derivative of the derivative of a function: Acceleration is the second derivative of distance with respect to time.
  • self-conservation — the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights.
  • self-preservation — preservation of oneself from harm or destruction.
  • sensitivity group — a group of persons participating in sensitivity training.
  • silent revolution — a social or political revolution that takes place with little warning and without great fuss or unrest
  • silver collection — a collection that consists of silver coins that is made at a meeting etc
  • sinus of valsalva — any of the pouches of the aorta and the pulmonary artery opposite the flaps of the semilunar valves into which blood returning to the heart flows, closing the valves.
  • situations vacant — Situations Vacant is the title of a column or page in a newspaper where jobs are advertised.
  • sleep deprivation — a condition in which you have not had enough sleep
  • sodium-vapor lamp — an electric lamp in which sodium vapor is activated by current passing between two electrodes, producing a yellow, glareless light: used on streets and highways.
  • softvelocity inc. — (company)   The distributors of the Clarion family of application development systems.
  • soil conservation — any of various methods to achieve the maximum utilization of the land and preserve its resources through such controls as crop rotation, prevention of soil erosion, etc.
  • squash vine borer — the larva of a clearwing moth, Melittia satyriniformis, that bores into the stems of squash and related plants.
  • state the obvious — point out sth already evident
  • stellar evolution — the sequence of changes that occurs in a star as it ages
  • subclavian groove — either of two grooves in the first rib, one for the main artery (subclavian artery) and the other for the main vein (subclavian vein) of the arm
  • subtractive color — cyan, yellow, or magenta, as used in the subtractive process of color photography.
  • superconductivity — the phenomenon of almost perfect conductivity shown by certain substances at temperatures approaching absolute zero. The recent discovery of materials that are superconductive at temperatures hundreds of degrees above absolute zero raises the possibility of revolutionary developments in the production and transmission of electrical energy.
  • supervision order — an order by a juvenile court requiring a named probation officer or local-authority social worker to advise, assist, and befriend a child or young person who is the subject of care proceedings, over a period of up to three years
  • supervisory board — a board of management of which nonmanagerial workers are members, having supervisory powers over some aspects of management decision-making
  • survivor syndrome — a characteristic group of symptoms, including recurrent images of death, depression, persistent anxiety, and emotional numbness, occurring in survivors of disaster.
  • synovial membrane — anatomy: connective tissue
  • telephone service — a company or public utility that provides a telephone-operating service
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