18-letter words containing p, l, e, c, t, r
- positively charged — having a positive charge
- postal storage car — a railroad car for transporting unsorted mail.
- potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- pour cold water on — If someone pours cold water on a plan or idea, they criticize it so much that people lose their enthusiasm for it.
- precipitable water — the total water vapor contained in a unit vertical column of the atmosphere.
- predicate calculus — predicate logic
- preparatory school — a private or parochial secondary school, especially one boarding its students and providing a college-preparatory education.
- present participle — Grammar. a participle form, in English having the suffix -ing, denoting repetition or duration of an activity or event: used as an adjective, as in the growing weeds, and in forming progressive verb forms, as in The weeds are growing.
- principal argument — the radian measure of the argument between −π and π of a complex number. Compare argument (def 8c).
- product life cycle — the four stages (introduction, growth, maturity, and decline) into one of which the sales of a product fall during its market life
- proprietary colony — any of certain colonies, as Maryland and Pennsylvania, that were granted to an individual or group by the British crown and that were granted full rights of self-government.
- protective colloid — a lyophilic colloid added to a lyophobic sol to lessen its sensitivity to the precipitating effect of an electrolyte.
- protocol converter — (networking) A device or program to translate between different protocols which serve similar functions (e.g. TCP and TP4). Some call this a "gateway", though others use that term for other kinds of internetworking device.
- provascular tissue — procambium.
- pseudotuberculosis — an acute, sometimes fatal disease of rodents, birds, and other animals, including humans, caused by the bacterium Yersinia (Pasteurella) pseudotuberculosis, and characterized by the formation of nodules resembling those that result from tuberculosis.
- psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
- public expenditure — spending by central government, local authorities, and public corporations
- pulmonic airstream — a current of lung air set in motion by the respiratory muscles in the production of speech.
- pulp canal therapy — endodontics.
- real-time computer — a computer that can process data or information almost immediately
- red cluster pepper — a tropical, woody plant, Capsicum annuum fasciculatum, having erect, very pungent, red fruit in small clusters.
- reinforced plastic — plastic with fibrous matter, such as carbon fibre, embedded in it to confer additional strength
- repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
- replacement engine — an engine used to replace or substitute an older or broken engine (in a vehicle, etc)
- reprocessing plant — a plant where materials are treated in order to make them reusable
- resistance plasmid — any of a group of bacterial plasmids carrying genetic information that provide resistance to antibiotic drugs: some resistance plasmids are able to transfer themselves, and hence resistance, during conjugation
- resurrection plant — a desert plant, Selaginella lepidophylla, occurring from Texas to South America, having stems that curl inward when dry.
- retail price index — The retail price index is a list of the prices of typical goods which shows how much the cost of living changes from one month to the next.
- root canal therapy — endodontics.
- scripting language — a language that is used to write scripts, or executable sections of code that automate tasks.
- self-deprecatingly — in a self-deprecating manner
- self-preoccupation — the state of being preoccupied.
- self-tapping screw — a screw designed to tap its corresponding female thread as it is driven.
- sling psychrometer — a psychrometer so designed that the wet-bulb thermometer can be ventilated, to expedite evaporation, by whirling in the air.
- software backplane — (programming, tool) A CASE framework from Atherton.
- special prosecutor — (formerly) an independent counsel.
- special relativity — the state or fact of being relative.
- specialist teacher — a teacher with expertise in working with children with special educational needs, such as dyslexia
- spectrocolorimetry — the quantitative measure of colors by spectrophotometry.
- spectrofluorimeter — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
- spectrofluorometer — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
- spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
- spectropolarimeter — an instrument for determining the extent to which plane-polarized light of various wavelengths is rotated by certain solutions, consisting of a combination of a spectroscope and a polarimeter.
- spectropolariscope — an instrument combining the functions of a spectroscope with those of a polariscope.
- spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
- spherical triangle — a triangle formed by arcs of great circles of a sphere.
- split-level cooker — a cooker that is designed with a separate oven and hob so that they can be fitted wherever is most convenient in the kitchen
- spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
- subatomic particle — physics: