17-letter words containing p, a, c, t
- loco supra citato — l.s.c.
- logical operation — Boolean operation.
- lower paleolithic — See under Paleolithic.
- magnetic monopole — a hypothetical very heavy particle with an isolated magnetic north pole or magnetic south pole.
- maintainer script — (Debian) One of the scripts (preinst, prerm, postinst, postrm) that may be included in a Debian binary package. These scripts may create and/or remove symlinks, files or directories that, for some reason, could not be done directly by dpkg. Maintainer scripts frequently create or update the symlinks in the /etc/rc?.d directories and start, stop, or restart daemons.
- manhattan project — U.S. History. the unofficial designation for the U.S. War Department's secret program, organized in 1942, to explore the isolation of radioactive isotopes and the production of an atomic bomb: initial research was conducted at Columbia University in Manhattan.
- mass spectrograph — a mass spectroscope for recording a mass spectrum on a photographic plate.
- mass spectrometer — a device for identifying the kinds of particles present in a given substance: the particles are ionized and beamed through an electromagnetic field and the manner in which they are deflected is indicative of their mass and, thus, their identity.
- mass spectroscope — an instrument used to determine the masses of small, electrically charged particles.
- mass spectroscopy — an instrument used to determine the masses of small, electrically charged particles.
- mayflower compact — an agreement to establish a government, entered into by the Pilgrims in the cabin of the Mayflower on November 11, 1620.
- merchant shipping — shipping which is involved in commerce (rather than defence, etc)
- metabolic pathway — biochemistry: sequence of reactions within a cell or organism
- metaperiodic acid — the crystalline compound HIO4, an oxyacid of iodine
- microencapsulated — Encapsulated using microencapsulation.
- micromanipulation — the technique of performing mechanical operations under high magnification through the use of specialized tools.
- micromanipulators — Plural form of micromanipulator.
- micropaleontology — the branch of paleontology dealing with the study of microscopic fossils.
- microphanerophyte — any shrub or tree having a height of 2 to 8 metres
- microphotographic — Relating to microphotography.
- mitre corporation — (body) A US federally funded R&D center, spun off in 1958 from the MIT Lincoln Laboratory (also an FFRDC). MITRE is a non-profit corporation chartered to do R&D in the public interest. MITRE were responsible for system engineering and implementation oversight of SAGE. MITRE does not stand for MIT Research and Engineering, though it could have.
- mount kirkpatrick — a mountain in Antarctica, in S Victoria Land in the Queen Alexandra Range. Height: 4528 m (14 856 ft)
- mounted policeman — policemen who patrol on horseback
- multidisciplinary — composed of or combining several usually separate branches of learning or fields of expertise: a multidisciplinary study of the 18th century.
- multiple-unit car — a self-propelled railroad car, generally used in commuting service, equipped so that a train of such cars can be operated from any one of them.
- negative particle — a word that indicates negativity, for example 'not' in English or 'ne pas' in French
- nephelometrically — By means of nephelometry.
- neuropathological — (medicine) Of, pertaining to, or arising from neuropathology, the pathology of nerve tissue.
- neuropsychiatrist — A medical doctor specializing in neuropsychiatry; a medical doctor dealing with disorders that have both neurological and psychiatric features.
- newspaper cutting — clipping from a news publication
- non-reciprocating — to give, feel, etc., in return.
- non-stereotypical — a process, now often replaced by more advanced methods, for making metal printing plates by taking a mold of composed type or the like in papier-mâché or other material and then taking from this mold a cast in type metal.
- non-thermoplastic — soft and pliable when heated, as some plastics, without any change of the inherent properties.
- nonaccomplishment — Something that does not achieve the intended goal.
- nonimpact printer — a printer that creates images without mechanically impacting the page, as an ink-jet or laser printer.
- occipital condyle — a protrusion on the occipital bone of the skull that forms a joint with the first cervical vertebra, enabling the head to move relative to the neck.
- olympic mountains — a mountain range in NW Washington: part of the Coast Range. Highest peak: Mount Olympus, 2427 m (7965 ft)
- omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
- on the pig's back — successful; established
- onomatopoetically — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
- operations centre — a centre where activities of a business, organization, etc, are administrated and take place
- opisthobranchiate — (zoology) Of or pertaining to the Opisthobranchiata.
- opportunistically — adhering to a policy of opportunism; practicing opportunism.
- optical astronomy — the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
- optical carrier 3 — (networking) (OC-3) A SONET rate of 3 * 51.84 = 155.52 megabits per second, which matches STS-3.
- optical carrier n — (networking) (OC-n) A SONET rate of n times 51.84 megabits per second.
- optical computing — (hardware) (Or "Optical Signal Processing") Operating on data represented using electromagnetic radiation, e.g. visible light, instead of the electrical signals used in a conventional electronic digital computer. Electronic digital computers are built from transistors. These form components that store data and logic gates that perform the low-level Boolean operations such as AND, OR and NOT that are the basis of all digital computation. The optical equivalent requires material with a non-linear refractive index such that light beams can interact with each other to perform the same Boolean operations. Though the photons that carry optical signals offer some theoretical advantages over the electrons that carry electronic signals, there are many practical problems that would have to be overcome before optical computing could compete in terms of cost, power and speed.
- optical isomerism — stereoisomerism in which the isomers are identical in molecular weight and most chemical and physical properties but differ in their effect on the rotation of polarized light.
- organ-pipe cactus — a treelike or columnar cactus, Lemaireocereus marginatus, of Mexico, having a central, erect spine surrounded by spreading spines in clusters of five to eight, and funnel-shaped, brownish-purple flowers.
- over-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.