25-letter words containing t, e, r

network operations center — (NOC) A location from which the operation of a network or internet is monitored. Additionally, this center usually serves as a clearinghouse for connectivity problems and efforts to resolve those problems. See also Network Information Center.
neurocirculatory asthenia — cardiac neurosis.
never do things by halves — If you say that someone never does things by halves, you mean that they always do things very thoroughly.
nine/seven/ten-day wonder — If you say that someone or something is a nine -day wonder or a one -day wonder, you disapprove of the fact that they are attracting so much interest and attention, because you think that their popularity will only last for a very short time.
no disrespect (to sb/sth) — You can say 'no disrespect to someone or something' when you are just about to criticize them, in order to indicate that you are not hostile towards them or admire them for other things.
non-algorithmic procedure — heuristic
normal equivalent deviate — a value x such that the integral of a normal curve over all those values of the independent variable less than x is equal to the given probability.
northern corn-leaf blight — northern leaf blight.
not darken someone's door — not come to someone's home
not for the faint-hearted — If you say that something is not for the faint-hearted, you mean that it is an extreme or very unusual example of its kind, and is not suitable for people who like only safe and familiar things.
not take no for an answer — to continue in a course of action despite refusals
nuffield teaching project — (in Britain) a complete school programme in mathematics, science, languages, etc, with suggested complementary theory and practical work
object relational mapping — (programming, database) (ORM) The software development activity that defines a correspondence between objects in a program and rows in a database table. Atomic object properties correspond to columns in the table, non-atomic data types and relations between objects are represented as foreign keys referring to other tables. An object persistence mechanism is responsible for maintaining the correspondence between objects and the database contents at run-time.
observational equivalence — Two terms M and N are observationally equivalent iff for all contexts C[] where C[M] is a valid term, C[N] is also a valid term with the same value.
off-balance sheet reserve — a sum of money or an asset that should appear on a company's balance but does not; hidden reserve
office of war information — OWI.
on the horns of a dilemma — one of the bony, permanent, hollow paired growths, often curved and pointed, that project from the upper part of the head of certain ungulate mammals, as cattle, sheep, goats, or antelopes.
on the spur of the moment — a U -shaped device that slips over and straps to the heel of a boot and has a blunt, pointed, or roweled projection at the back for use by a mounted rider to urge a horse forward.
on the tip of your tongue — If a comment or question is on the tip of your tongue, you really want to say it or ask it, but you decide not to say it.
on the understanding that — with the condition that; providing
open educational resource — Usually, open educational resources. a piece of content or a tool for teaching or learning, often developed online, that is made available free of charge for anyone to use, revise, adapt, or redistribute. Abbreviation: OER.
open systems interconnect — Open Systems Interconnection
operator control language — (language) (OCL) The batch language for the IBM System/36, used specifically with the RPG II compiler. See also CL.
orpheus in the underworld — a classical operetta; the French name is Orphée aux enfers
out of kilter, off kilter — If something or someone is out of kilter or off kilter, they are not completely right.
outside broadcasting unit — a mobile studio from which broadcasts are made
over-the-counter medicine — An over-the-counter medicine is a medicine that may be sold without a doctor's prescription.
oxidative phosphorylation — the aerobic synthesis, coupled to electron transport, of ATP from phosphate and ADP.
page description language — a high-level programming language for determining the output of a page printer designed to work with it, independent of the printer's internal codes. Abbreviation: PDL.
palo alto research center — XEROX PARC
palo alto research centre — XEROX PARC
peripheral nervous system — the portion of the nervous system lying outside the brain and spinal cord.
permanent virtual circuit — (networking) (PVC, or in ATM terminology, "Permanent Virtual Connection") A virtual circuit that is permanently established, saving the time associated with circuit establishment and tear-down.
personal flotation device — a life preserver, life jacket, or other device for keeping a person afloat in the water. Abbreviation: PFD.
personal-opinion telegram — a type of domestic telegram sent at the lowest rate with a minimum charge for 20 words or less to elected federal or state officials on a subject of national or regional interest.
personalized number plate — a car registration plate that has the owner's initials or name on it
petropavlovsk-kamchatskiy — seaport in E Asian Russia, on Kamchatka Peninsula: pop. 210,000
pharmacotherapeutic group — Drugs and agents are categorized into pharmacotherapeutic groups based on which diseases they are designed to treat.
phase contrast microscope — a microscope that utilizes the phase differences of light rays transmitted by different portions of an object to create an image in which the details of the object are distinct despite their near-uniformity of refractive index.
phase-contrast microscope — a microscope that utilizes the phase differences of light rays transmitted by different portions of an object to create an image in which the details of the object are distinct despite their near-uniformity of refractive index.
poacher turned gamekeeper — someone whose occupation or behaviour is the opposite of what it previously was, such as a burglar who now advises on home security
point-and-drool interface — (abuse) (Or "point-and-grunt interface") A parody of "point-and-shoot interface", describing a windows, icons, and mouse-based (WIMP) graphical user interface. The implication, of course, is that such an interface is only suitable for idiots. See for the rest of us, WIMP, drool-proof paper.
point-and-grunt interface — point-and-drool interface
polycystic ovary syndrome — a hormonal disorder in which the Graafian follicles in the ovary fail to develop completely so that they are unable to ovulate, remaining as multiple cysts that distend the ovary. The results can include reduced fertility, obesity, and hirsutism
polymerase chain reaction — a technique in which a known DNA sequence is synthesized at high temperatures by means of a polymerase, producing millions of copies for statistical analysis: used in DNA fingerprinting, in detecting minute quantities of cancer cells, etc.
polynomial-time algorithm — (complexity) A known algorithm (or Turing Machine) that is guaranteed to terminate within a number of steps which is a polynomial function of the size of the problem. See also computational complexity, exponential time, nondeterministic polynomial-time (NP), NP-complete.
portable network graphics — (file format) /ping/ (PNG) An extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-colour, greyscale and truecolour images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits. PNG is designed for on-line viewing applications, such as the World Wide Web, so it is fully streamable with a progressive display option. PNG is robust, providing both full file integrity checking and simple detection of common transmission errors. Also, PNG can store gamma correction and chromaticity data for improved colour matching on heterogeneous platforms.
positional representation — (mathematics) The conventional way of writing numbers as a string of digits in which each digit, D, has value D * R^I, where R is the radix or (number) base and I is the digit's position counting leftward from zero at the least significant (right-hand) end. Each digit can be zero to R-1. Each position has a weight or significance R times greater than the position to its right and the right-most place has a weight of one. Decimal numbers are radix ten, binary numbers are radix two, octal radix eight and hexadecimal radix 16. Positional representation makes arithmetic operations on large numbers much easier than, say, roman numerals. It is fundamental to the binary representation used by digital computers.
potassium sodium tartrate — a colorless or white, water-soluble solid, KNaC 4 H 4 O 6 ⋅4H 2 O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative.
poynting-robertson effect — the slowing down and consequent spiraling inward of small particles orbiting the sun, due to their interaction with solar radiation.

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