17-letter words containing p, r, a, t, f
- self-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
- self-depreciating — self-deprecating.
- self-impregnating — to make pregnant; get with child or young.
- self-perpetuating — continuing oneself in office, rank, etc., beyond the normal limit.
- self-presentation — an act of presenting.
- self-preservation — preservation of oneself from harm or destruction.
- self-purification — a natural process of purifying, as the ability of a body of water to rid itself of pollutants.
- separating funnel — a large funnel having a tap in its output tube, used to separate immiscible liquids
- set one's cap for — a close-fitting covering for the head, usually of soft supple material and having no visor or brim.
- software platform — a major piece of software, as an operating system, an operating environment, or a database, under which various smaller application programs can be designed to run.
- spatial frequency — the measure of fine detail in an optical image in terms of cycles per millimetre
- sports facilities — places and things for doing sports
- 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
- strike-slip fault — a geological fault on which the movement is along the strike of the fault
- sulfurated potash — a yellowish-brown mixture consisting mainly of potassium polysulfides and potassium thiosulfate, used in treating mange.
- temple of artemis — the temple at Ephesus dedicated to Artemis.
- terminal platform — (in the oil industry) an offshore platform from which oil or gas is pumped ashore through a pipeline
- to play with fire — If you say that someone is playing with fire, you mean that they are doing something dangerous that may result in great harm for them and cause many problems.
- traffic policeman — a policeman controlling traffic, esp while stationed at an intersection, or enforcing traffic regulations
- trapdoor function — a function defined from data by means of a mathematical procedure in such a way that it is easy to obtain the function when the data are known, but when the procedure and data are not known it becomes very difficult to determine the original data: used in cryptography, where the data are the characters of the plain text, or message, and the trapdoor function is the cryptogram.
- unconformity trap — An unconformity trap is a hydrocarbon trap where the closure is made by an unconformity (= a formation of rock layers which represents a gap in the geological record).
- unify corporation — (company) Developers of the Unify relational database. At one time, before Sybase, they were a competitor of Oracle, et al.
- wave-cut platform — a flat surface at the base of a cliff formed by erosion by waves