13-letter words containing x, f, a
- antireflexive — noting a relation in which no element is in relation to itself, as “less than.”.
- bat-eared fox — a fox, Vulpes chama, inhabiting dry areas of southern Africa and having large pointed ears, silvery gray coat, and a bushy tail with a black tip.
- 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
- bombax family — the plant family Bombacaceae, typified by tropical deciduous trees having palmate leaves, large and often showy solitary or clustered flowers, and dry fruit with a woolly pulp, and including the baobab and silk-cotton tree.
- ciprofloxacin — a broad-spectrum antibiotic used against Gram-negative bacteria. It is effective against anthrax
- ex post facto — having retrospective effect
- extractor fan — a fan used in kitchens, bathrooms, workshops, etc, to remove stale air or fumes
- extrafamilial — Outside a family.
- fixed capital — capital goods, as machinery and tools, that are relatively durable and can be used repeatedly in the production of goods.
- fluid-extract — a liquid preparation, containing alcohol as a solvent or as a preservative, that contains in each cubic centimeter the medicinal activity of one gram of the crude drug in powdered form.
- flying boxcar — a large airplane designed to carry cargo.
- foxtail wedge — a wedge in the split end of a tenon, bolt, or the like, for spreading and securing it when driven into a blind mortise or hole.
- magnetic flux — the total magnetic induction crossing a surface, equal to the integral of the component of magnetic induction perpendicular to the surface over the surface: usually measured in webers or maxwells.
- maxillofacial — of, relating to, or affecting the jaws and the face: maxillofacial surgery.
- mixed farming — agriculture: raising both crops and livestock
- mixing faucet — a single outlet for water from separately controlled hot-water and cold-water taps.
- oxford accent — the accent associated with Oxford English
- prefix syntax — prefix notation
- reflex camera — a camera in which the image appears on a ground-glass viewer (focusing screen) after being reflected by a mirror or after passing through a prism or semitransparent glass; in one type (single-lens reflex camera) light passes through the same lens to both the ground glass and the film, while in another type (twin-lens reflex camera) light passes through one lens (viewing lens) to the ground glass and through a second lens (taking lens) to the film, the lenses being mechanically coupled for focusing.
- reflex-action — Physiology. noting or pertaining to an involuntary response to a stimulus, the nerve impulse from a receptor being transmitted inward to a nerve center that in turn transmits it outward to an effector.
- saddle oxford — saddle shoe.
- soixante-neuf — sixty-nine (def 4).
- start of text — (character) (STX) Mnemonic for ASCII 2.
- storax family — the plant family Styracaceae, characterized by trees and shrubs having simple, alternate leaves, clusters of bell-shaped white flowers, and fleshy or dry fruit, and including the silver bell, snowbell, and storax.
- sulfisoxazole — a white to yellowish, crystalline, slightly bitter sulfonamide, C 1 1 H 1 3 N 3 O 3 S, used chiefly in the treatment of infections of the urinary tract.
- visual foxpro — (database) A Microsoft database derived from Fox Software's FoxPRO.
- x-certificate — a film classification indicating a film that may not be publicly shown to anyone under 18. Since 1982 replaced by symbol 18
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