15-letter words containing p, o, e, r, i
- slide projector — device for showing slides
- sneezing powder — a powder used to make people sneeze as a practical joke
- sodium peroxide — a yellowish-white, hygroscopic, water-soluble powder, Na 2 O 2 , used chiefly as a bleaching agent and as an oxidizing agent.
- sole proprietor — only owner
- somatic therapy — any of a group of treatments presumed to act on biological factors leading to mental illness.
- southern paiute — See under Paiute (def 2).
- spanish trefoil — alfalfa.
- spectrochemical — of, relating to, or utilizing the techniques of spectrochemistry.
- speech disorder — an inability to produce normal speech
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- spelling reform — an attempt to change the spelling of English words to make it conform more closely to pronunciation.
- spermatoblastic — relating to a spermatoblast
- spermatogenesis — the origin and development of spermatozoa.
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spinous process — a spinelike process of a bone, especially the dorsal projection from the center of the arch of a vertebra.
- spiny cocklebur — a cocklebur, Xanthium spinosum, introduced into North America from Europe.
- spiral notebook — a notebook held together by a coil of wire passed through small holes punched at the back edge of the covers and individual pages
- spirits of wine — alcohol (def 1).
- spirochaetaemia — the presence of spirochaetes in the blood
- sporting chance — an even or fair opportunity for a favorable outcome in an enterprise, as winning in a game of chance or in any kind of contest: They gave the less experienced players a sporting chance by handicapping the experts.
- sports medicine — a field of medicine concerned with the functioning of the human body during physical activity and with the prevention and treatment of athletic injuries.
- st. christopher — Saint, died a.d. c250, Christian martyr.
- steak au poivre — pepper steak (def 2).
- stereotypically — in a stereotypical manner
- stilpnosiderite — a resinous variety of limonite with a black-brown colour
- strephosymbolia — a condition of perceiving objects as their mirror image and, specifically, having difficulty in distinguishing letters in words
- streptobacillus — any of various bacilli that form in chains.
- stress position — an enforced body position, applied esp in the interrogation of detainees, which causes the victim pain by concentrating a large amount of his or her weight on a small number of muscles, joints, etc
- stretch a point — a sharp or tapering end, as of a dagger.
- styloid process — a long, spinelike process of a bone, especially the projection from the base of the temporal bone.
- subperiosteally — the normal investment of bone, consisting of a dense, fibrous outer layer, to which muscles attach, and a more delicate, inner layer capable of forming bone.
- subprofessional — being below professional standards: subprofessional health care.
- subreptitiously — in a subreptitious manner
- sulfite process — a process for making wood pulp by digesting wood chips in an acid liquor consisting of sulfurous acid and a salt, usually calcium bisulfite.
- sulphinpyrazone — a uricosuric drug with molecular formula C23H20N2O3S, used in the treatment of chronic gout
- sulphur dioxide — a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs (E220), bleaching, and disinfecting. Formula: SO2
- super-committee — a committee with members from two or more organizations or political groups
- superconfidence — great or extreme confidence, overconfidence
- superconvenient — highly convenient
- superexaltation — extreme or supreme exaltation; the act of superexalting; the process or condition of being superexalted
- superexcitation — the act of exciting.
- superimposition — to impose, place, or set over, above, or on something else.
- superinvolution — an act or instance of involving or entangling; involvement.
- superior planet — any of the five planets whose orbits are outside the orbit of the earth, namely, the planets Mars, Jupiter, Saturn, Uranus, and Neptune.
- superordination — Logic. the relation between a universal proposition and a particular proposition of the same quality containing the same terms in the same order.
- superpatriotism — the quality of being superpatriotic
- supporting role — acting: secondary part
- suppressor grid — an electrode placed between the screen grid and anode of a valve. Its negative potential, relative to both screen and anode, prevents secondary electrons from the anode reaching the screen
- supreme council — the legislature of the former Soviet Union and its successor states, consisting of an upper house (Soviet of the Union or Council of the Union) whose delegates are elected on the basis of population, and a lower house (Soviet of Nationalities or Council of Nationalities) whose delegates are elected to represent the various nationalities.