13-letter words containing p, r, e, x, y
- approximately — close to; around; roughly or in the region of
- archaeopteryx — any of several extinct primitive birds constituting the genus Archaeopteryx, esp A. lithographica, which occurred in Jurassic times and had teeth, a long tail, well-developed wings, and a body covering of feathers
- binary prefix — (unit) (Or "IEC prefix") A prefix used with a unit of data to mean multiplication by a power of 1024. Binary prefixes are most often used with "byte" (e.g. "kilobyte") but also with bit (e.g. "megabit"). For example, the term kilobyte has historically been used to mean 1024 bytes, and megabyte to mean 1,048,576 bytes. The multipliers 1024 and 1,048,576 are powers of 1024, which is itself a power of two (1024 = 2^10). It is this factor of two that gives the name "binary prefix". This is in contrast to a decimal prefix denoting a power of 1000, which is itself a power of ten (1000 = 10^3). Decimal prefixes are used in science and engineering and are specified in widely adopted SI standards. Note that the actual prefix - kilo or mega - is the same, it is the interpretation that differs. The difference between the two interpretations increases with each multiplication, so while 1000 and 1024 differ by only 2.4%, 1000^6 and 1024^6 differ by 15%. The 1024-based interpretation of prefixes is often still used informally and especially when discussing the storage capacity of random-access memory. This has lead to storage device manufacturers being accused of false marketing for using the decimal interpretation where customers might assume the larger, historical, binary interpretation. In an attempt to clarify the distinction, in 1998 the IEC specified that kilobyte, megabyte, etc. should only be used for powers of 1000 (following SI). They specified new prefixes for powers of 1024 containing "bi" for "binary": kibibyte, mebibyte, etc.; an idea originally propsed by IUPAC. IEC also specified new abbreviations Ki, Mi, etc. for the new prefixes. Many other standards bodies such as NIST, IEEE and BIPM support this proposal but as of 2013 its use is rare in non-technical circles. Specific units of IEC 60027-2 A.2 and ISO/IEC 80000
- clinopyroxene — a member of the pyroxene group of minerals having a monoclinic crystal structure, such as augite, diopside, or jadeite
- complexometry — a chemical technique using the formation of a colored complex to indicate the end of a titration.
- exasperatedly — In an exasperated manner.
- expeditionary — Of or forming an expedition, especially a military expedition.
- expert system — (artificial intelligence) A computer program that contains a knowledge base and a set of algorithms or rules that infer new facts from knowledge and from incoming data. An expert system is an artificial intelligence application that uses a knowledge base of human expertise to aid in solving problems. The degree of problem solving is based on the quality of the data and rules obtained from the human expert. Expert systems are designed to perform at a human expert level. In practice, they will perform both well below and well above that of an individual expert. The expert system derives its answers by running the knowledge base through an inference engine, a software program that interacts with the user and processes the results from the rules and data in the knowledge base. Expert systems are used in applications such as medical diagnosis, equipment repair, investment analysis, financial, estate and insurance planning, route scheduling for delivery vehicles, contract bidding, counseling for self-service customers, production control and training.
- explanatorily — With regard to explanatory power.
- exploratively — in an explorative manner
- exportability — The property of being exportable.
- expostulatory — Of, characterized by, or exhibiting expostulation.
- extemporarily — In an extemporary manner.
- hydroperoxide — any chemical compound having the general formula, ROOH, where R is an element or an organic group.
- hyperextended — Extremely long; extended greatly.
- hyperflexible — capable of being bent, usually without breaking; easily bent: a flexible ruler.
- hyperprosexia — a condition in which the whole attention is occupied by one object or idea to the exclusion of others
- hypertoxicity — the quality, relative degree, or specific degree of being toxic or poisonous: to determine the toxicity of arsenic.
- inexpressibly — not expressible; incapable of being uttered or described in words: a scene of inexpressible beauty.
- methoxy group — the univalent group CH 3 O−.
- orthopyroxene — a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene
- parasexuality — parasexual behaviour
- phenoxy resin — any of a class of resins derived from polyhydroxy ethers
- prefix syntax — prefix notation
- primary xylem — xylem derived directly from the growth of an apical meristem.
- proparoxytone — having an accent or heavy stress on the antepenultimate syllable.
- proxy gateway — proxy server
- saint-exupery — Antoine de [ahn-twan duh] /ɑ̃ˈtwan də/ (Show IPA), 1900–45, French author and aviator.
- soapbox derby — a race between children in homemade racing carts
- unexplanatory — serving to explain: an explanatory footnote.
- x-ray therapy — treatment of a disease using controlled quantities of x-rays.
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