16-letter words containing o, n, s, i
- offensive weapon — an instrument designed to be used in attack, or an object which may be used in attack
- ohm, georg simon — Georg Simon Ohm
- ohmic resistance — resistance (def 3a).
- oil installation — a facility or place where petroleum is extracted for industrial purposes
- oil storage tank — a very large industrial container where petroleum is stored
- oligonucleotides — Plural form of oligonucleotide.
- on a trial basis — for the purpose of assessment
- on its last legs — about to fail
- on the defensive — If someone is on the defensive, they are trying to protect themselves or their interests because they feel unsure or threatened.
- on the safe side — as a precaution
- on the sidelines — in the area along the sidelines
- on-the-spot fine — a fine that is charged immediately upon being caught and found guilty of a crime
- online thesaurus — a thesaurus or dictionary of words with the same or nearly the same meanings, or synonyms, and their opposites, or antonyms, such as Thesaurus.com, available on the Internet or the World Wide Web, accessed through a web browser, and used by entering a query term into a search box on the site. An online thesaurus provides immediate electronic access to lists of alternate terms for the queried word, covering its various shades of meaning: This online thesaurus showed me that smart, as an adjective, not only means intelligent, but also stylish, or lively, and gave long lists of other words for each meaning.
- open box testing — white box testing
- open parenthesis — left parenthesis
- open scholarship — a scholarship which anyone can apply for
- operating system — (operating system) (OS) The low-level software which handles the interface to peripheral hardware, schedules tasks, allocates storage, and presents a default interface to the user when no application program is running. The OS may be split into a kernel which is always present and various system programs which use facilities provided by the kernel to perform higher-level house-keeping tasks, often acting as servers in a client-server relationship. Some would include a graphical user interface and window system as part of the OS, others would not. The operating system loader, BIOS, or other firmware required at boot time or when installing the operating system would generally not be considered part of the operating system, though this distinction is unclear in the case of a rommable operating system such as RISC OS. The facilities an operating system provides and its general design philosophy exert an extremely strong influence on programming style and on the technical cultures that grow up around the machines on which it runs. Example operating systems include 386BSD, AIX, AOS, Amoeba, Angel, Artemis microkernel, BeOS, Brazil, COS, CP/M, CTSS, Chorus, DACNOS, DOSEXEC 2, GCOS, GEORGE 3, GEOS, ITS, KAOS, Linux, LynxOS, MPV, MS-DOS, MVS, Mach, Macintosh operating system, Microsoft Windows, MINIX, Multics, Multipop-68, Novell NetWare, OS-9, OS/2, Pick, Plan 9, QNX, RISC OS, STING, System V, System/360, TOPS-10, TOPS-20, TRUSIX, TWENEX, TYMCOM-X, Thoth, Unix, VM/CMS, VMS, VRTX, VSTa, VxWorks, WAITS.
- operating-system — the collection of software that directs a computer's operations, controlling and scheduling the execution of other programs, and managing storage, input/output, and communication resources. Abbreviation: OS.
- opportunity cost — the money or other benefits lost when pursuing a particular course of action instead of a mutually-exclusive alternative: The company cannot afford the opportunity cost attached to policy decisions made by the current CEO.
- opportunity shop — a shop selling second-hand goods for charitable funds
- opposed-cylinder — (of an internal-combustion engine) having cylinders on opposite sides of the crankcase in the same plane
- optical illusion — something that deceives by producing a false or misleading impression of reality.
- optical scanning — the process of interpreting data in printed, handwritten, bar-code, or other visual form by a device (optical scanner or reader) that scans and identifies the data.
- osculating plane — the plane containing the circle of curvature of a point on a given curve.
- ostend manifesto — a declaration (1854) issued from Ostend, Belgium, by the U.S. ministers to England, France, and Spain, stating that the U.S. would be justified in seizing Cuba if Spain did not sell it to the U.S.
- ostentatiousness — characterized by or given to pretentious or conspicuous show in an attempt to impress others: an ostentatious dresser.
- otherworldliness — The quality of being otherworldly.
- otolaryngologist — Otorhinolaryngologist.
- ovals of cassini — the locus of a point x, whose distance from two fixed points, a and b, is such that |x–a| |x–b| is a constant
- over-consumption — the act of consuming, as by use, decay, or destruction.
- over-nourishment — something that nourishes; food, nutriment, or sustenance.
- over-sentimental — expressive of or appealing to sentiment, especially the tender emotions and feelings, as love, pity, or nostalgia: a sentimental song.
- over-speculation — the contemplation or consideration of some subject: to engage in speculation on humanity's ultimate destiny.
- overcautiousness — the quality or state of being too cautious, wary, or careful
- overcompensating — Present participle of overcompensate.
- overcompensation — a pronounced striving to neutralize and conceal a strong but unacceptable character trait by substituting for it an opposite trait.
- overenthusiastic — full of or characterized by enthusiasm; ardent: He seems very enthusiastic about his role in the play.
- oversubscription — to subscribe for more of than is available, expected, or required: The charity drive was oversubscribed by several thousand dollars.
- overwhelmingness — that overwhelms; overpowering: The temptation to despair may become overwhelming.
- ovshinsky effect — an effect that turns special types of glassy, thin films into semiconductors upon application of low voltage.
- pacific sturgeon — a dark gray sturgeon, Acipenser transmontanus, inhabiting marine and fresh waters along the northwestern coast of North America, valued as a food and sport fish.
- pairs tournament — an event in a sport such as tennis or darts open to pairs of competitors
- panel discussion — a formal discussion before an audience for which the topic, speakers, etc., have been selected in advance.
- panoramic screen — a very wide screen, as of a television, etc
- paraprofessional — a person trained to assist a doctor, lawyer, teacher, or other professional, but not licensed to practice in the profession.
- parts of lindsey — an area in E England constituting a former administrative division of Lincolnshire
- pascal's limacon — limaçon.
- passage to india — a novel (1924) by E. M. Forster.
- passenger pigeon — an extinct pigeon, Ectopistes migratorius, once found in great numbers in North America, noted for its sustained migratory flights.
- paulinus of nola — Saint. ?353–431 ad, Roman consul and Christian poet; bishop of Nola (409–431). Feast day: June 22