15-letter words containing x, a, n
- phoenix islands — a group of eight coral islands in the central Pacific: administratively part of Kiribati. Area: 28 sq km (11 sq miles). The islands and surrounding waters form the Phoenix Islands Protected Area, the world's largest marine protected area. Area: 410 500 sq km (158 500 sq miles)
- photoexcitation — the creation of an increase in energy in atoms, molecules or ions caused by the absorption of a photon
- prefix notation — (language) (Or "prefix syntax") One of the possible orderings of functions and operands: in prefix notation the function precedes all its operands. For example, what may normally be written as "1+2" becomes "(+ 1 2)". A few languages (e.g., lisp) have strictly prefix syntax, many more employ prefix notation in combination with infix notation. The opposite, postfix notation, is somewhat rarer.
- prepaid expense — A prepaid expense is an expense that has been paid for before it is incurred, and that is treated as an asset.
- proxy statement — a statement containing information, frequently exhaustive, about a corporation, its officers, and any propositions to be voted on, sent to stockholders when their proxies are being solicited for an annual or a special stockholders' meeting.
- pseudohexagonal — of, relating to, or having the form of a hexagon.
- qualifying exam — any examination that one needs to pass in order to begin or continue with a course of study
- query expansion — (information science) Adding search terms to a user's search. Query expansion is the process of a search engine adding search terms to a user's weighted search. The intent is to improve precision and/or recall. The additional terms may be taken from a thesaurus. For example a search for "car" may be expanded to: car cars auto autos automobile automobiles. The additional terms may also be taken from documents that the user has specified as being relevant; this is the basis for the "more like this" feature of some search engines. The extra terms can have positive or negative weights.
- recontextualize — to contextualize (something) again
- reflexivization — to make (a verb or pronoun) reflexive.
- relaxation time — the time that it takes for an exponentially decaying quantity, as radioactive particles or transient electrical currents, to decrease to 36.8 percent of its initial value.
- secondary xylem — xylem derived from the cambium during secondary growth.
- sinistrodextral — moving or extending from the left to the right.
- sixth amendment — an amendment to the U.S. Constitution, ratified in 1791 as part of the Bill of Rights, guaranteeing the right to a trial by jury in criminal cases.
- superexaltation — extreme or supreme exaltation; the act of superexalting; the process or condition of being superexalted
- superexcitation — the act of exciting.
- syntax language — a metalanguage used to refer to the grammatical or other formal features of an object language.
- tax expenditure — any reduction in government revenue through preferential tax treatment, as deductions or credits.
- telamonian ajax — Ajax (def 1).
- toxin-antitoxin — a mixture of toxin and antitoxin, formerly used to induce active immunity against certain diseases, especially diphtheria.
- transverse axis — the axis of a hyperbola that passes through the two foci.
- unexceptionable — not offering any basis for exception or objection; beyond criticism: an unexceptionable record of achievement.
- unextraordinary — beyond what is usual, ordinary, regular, or established: extraordinary costs.
- unix conspiracy — [ITS] According to a conspiracy theory long popular among ITS and TOPS-20 fans, Unix's growth is the result of a plot, hatched during the 1970s at Bell Labs, whose intent was to hobble AT&T's competitors by making them dependent upon a system whose future evolution was to be under AT&T's control. This would be accomplished by disseminating an operating system that is apparently inexpensive and easily portable, but also relatively unreliable and insecure (so as to require continuing upgrades from AT&T). This theory was lent a substantial impetus in 1984 by the paper referenced in the back door entry. In this view, Unix was designed to be one of the first computer viruses (see virus) - but a virus spread to computers indirectly by people and market forces, rather than directly through disks and networks. Adherents of this "Unix virus" theory like to cite the fact that the well-known quotation "Unix is snake oil" was uttered by DEC president Kenneth Olsen shortly before DEC began actively promoting its own family of Unix workstations. (Olsen now claims to have been misquoted.)
- uranium dioxide — a black, crystalline compound, UO 2 , insoluble in water, used in nuclear fuel rods, in ceramics, and pigments.
- vine phylloxera — a homopterous insect, Phylloxera vitifolia, typically feeding on vine juices
- wage indexation — the linking of wages to an index representing the cost of living, so that they are automatically adjusted up or down as that rises or falls
- withholding tax — that part of an employee's tax liability withheld by the employer from wages or salary and paid directly to the government.
- x-ray astronomy — the branch of astronomy that studies celestial objects by means of the x-rays emitted by them.
- x-ray diagnosis — diagnosis by means of an X-ray
- xenotransplants — Plural form of xenotransplant.