17-letter words containing a, p, e, r, i
- spark transmitter — a transmitting set that generates electromagnetic waves by the oscillatory discharge from a capacitor through an inductor and a spark gap.
- spatial frequency — the measure of fine detail in an optical image in terms of cycles per millimetre
- special messenger — a postal worker who delivers mail by special delivery
- special privilege — exclusive advantage
- spectroheliograph — an apparatus for making photographs of the sun with a monochromatic light to show the details of the sun's surface and surroundings as they would appear if the sun emitted only that light.
- spectroradiometer — an instrument for determining the radiant-energy distribution in a spectrum, combining the functions of a spectroscope with those of a radiometer.
- spectroscopically — an optical device for producing and observing a spectrum of light or radiation from any source, consisting essentially of a slit through which the radiation passes, a collimating lens, and an Amici prism.
- spectrum analysis — the determination of the constitution or condition of bodies and substances by means of the spectra they produce.
- spenserian sonnet — a sonnet employing the rhyme scheme abab, bcbc, cdcd, ee.
- spenserian stanza — the stanza used by Spenser in his Faerie Queene and employed since by other poets, consisting of eight iambic pentameter lines and a final Alexandrine, with a rhyme scheme of ababbcbcc.
- sperrin mountains — a mountain range in NW Northern Ireland
- spherical polygon — a closed figure formed by arcs of great circles on a spherical surface.
- spiny-headed worm — any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates.
- spiral bevel gear — a bevel gear having curved teeth tending to converge on the axis of rotation.
- spiritual bouquet — the spiritual presentation of a good work to another person.
- spiritual healing — faith healing
- split keyboarding — the act or practice of editing data from one terminal on another terminal
- split personality — multiple personality.
- sports facilities — places and things for doing sports
- spotted sandpiper — a North American sandpiper, Actitis macularia, that has brownish-gray upper parts and white underparts, and is spotted with black in the summer.
- spread your wings — if you spread your wings, you do something new and rather difficult or move to a new place, because you feel more confident in your abilities than you used to and you want to gain wider experience
- spring cankerworm — the striped, green caterpillar of any of several geometrid moths: a foliage pest of various fruit and shade trees, as Paleacrita vernata (spring cankerworm) and Alsophila pometaria (fall cankerworm)
- spruce gall aphid — any of various homopterous insects of the family Adelgidae, as Adelges abietis (spruce gall aphid) and Pineus pinifoliae (pine leaf aphid) that feed and form galls on conifers.
- stars and stripes — US national flag
- steamboat springs — a town in NW Colorado: ski resort.
- stereolithography — a process for creating three-dimensional objects using a computer-controlled laser to build up the required structure, layer by layer, from a liquid photopolymer that solidifies.
- storm in a teacup — a violent fuss or disturbance over a trivial matter
- stratified sample — a sample that is not drawn at random from the whole population, but separately from a number of disjoint strata of the population in order to ensure a more representative sample
- stray capacitance — undesired capacitance in equipment, occurring between the wiring, between the wiring and the chassis, or between components and the chassis
- strike-slip fault — a geological fault on which the movement is along the strike of the fault
- subscription rate — the price charged for a subscription
- super-nationalism — an extreme or fanatical loyalty or devotion to a nation.
- super-terrestrial — pertaining to, consisting of, or representing the earth as distinct from other planets.
- superaerodynamics — the branch of aerodynamics that deals with gases at very low densities.
- superalimentation — nourishment; nutrition.
- supercolumniation — the placing of one order of columns above another.
- supermassive star — Astronomy. a star with a mass more than fifty times the mass of the sun.
- superregeneration — regeneration in which a signal is alternately amplified and quenched at a frequency slightly above the audible range to achieve high sensitivity with a single tube.
- supervisory board — a board of management of which nonmanagerial workers are members, having supervisory powers over some aspects of management decision-making
- support mechanism — any formal system or method of providing support or assistance
- supreme sacrifice — the sacrifice of one's own life: Many made the supreme sacrifice during the war.
- tactile corpuscle — an oval sense organ made of flattened cells and encapsulated nerve endings, occurring in hairless skin, as the tips of the fingers and toes, and functioning as a touch receptor.
- taiping rebellion — a movement of religious mysticism and agrarian unrest in China between 1850 and 1864 which weakened the Manchu dynasty but was eventually suppressed with foreign aid
- take in good part — to respond to (teasing) with good humour
- take no prisoners — to be uncompromising and resolute in one's actions
- take-no-prisoners — wholeheartedly aggressive; zealous; gung-ho: a businessman with a take-no-prisoners attitude toward dealmaking.
- teaching practice — Teaching practice is a period that a student teacher spends teaching at a school as part of his or her training.
- technical support — an advising and troubleshooting service provided by a manufacturer, typically a software or hardware developer, to its customers, often online or on the telephone.
- telescopic damper — a device with telescopic parts that reduce vibration in a motor vehicle
- temple of artemis — the temple at Ephesus dedicated to Artemis.