17-letter words containing u, p, f
- spatial frequency — the measure of fine detail in an optical image in terms of cycles per millimetre
- specific humidity — the ratio of the mass of water vapor in air to the total mass of the mixture of air and water vapor.
- speech difficulty — a problem encountered in speaking
- spiritus frumenti — whiskey.
- 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.
- sulphur butterfly — sulfur butterfly.
- supreme sacrifice — the sacrifice of one's own life: Many made the supreme sacrifice during the war.
- take upon oneself — to take the responsibility for; accept as a charge
- the south pacific — the part of the Pacific Ocean to the south of the equator
- 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.
- unprofessionalism — not professional; not pertaining to or characteristic of a profession.
- waiver of premium — a provision in a policy establishing specific conditions under which the policy will be kept in force without the policyholder's being required to continue to pay premiums.
- walleye surfperch — a common black and silvery surfperch (Hyperprosopon argenteum) found off the coast of California
- wave-cut platform — a flat surface at the base of a cliff formed by erosion by waves