23-letter words containing a, c, e, l
- uniform commercial code — a codification of commercial laws designed to provide uniformity among the states
- universal character set — (character, standard) (UCS, ISO/IEC 10646) A 1993 ISO and IEC standard character set, also known as "Universal Multiple-Octet Coded Character Set". UCS comes in a 16-bit variant called UCS-2 and a 32-bit variant called UCS-4, which is composed of 16-bit UCS-2 "planes". So far only one 16-bit plane has been defined, which is known as the Basic Multilingual Plane. The implementation of UCS is still in its infancy, though some moves, such as the Java language defining a character to be 16 bits, are suggestive.
- user interface language — (language, graphics) (UIL) A language for specifying widget hierarchies etc. in OSF/Motif and DECwindows.
- valera y alcala galiano — Juan [hwahn] /ʰwɑn/ (Show IPA), 1824–1905, Spanish novelist, critic, diplomat, and statesman.
- variable contrast paper — printing paper in which the contrast of the image is controlled by the color of the printing light.
- variable life insurance — an insurance policy whose annuity payments or payment to the beneficiary are not fixed but depend on the income earned by the investment of the premiums.
- velocity of circulation — the frequency with which a single unit of currency or the total money supply turns over within the economy in a given year.
- ventricular tachycardia — a cardiac arrhythmia in which the muscles of the ventricles contract irregularly in a rapid, uncoordinated manner, impairing the normal pumping of blood.
- verifiability principle — the doctrine that if a nonanalytic statement is to be cognitively meaningful it must be empirically verifiable.
- vestibulocochlear nerve — either one of the eight pairs of cranial nerves that supply the cochlea and semicircular canals of the internal ear and contribute to the sense of hearing
- virtual device location — (Or "Virtual Address") The address of a device (e.g. disk, printer, terminal) belonging to a "guest" operating system. Such an address is mapped to a physical device. VM may remap several virtual disks to different parts of a single physical disk.
- viscount horatio nelson — Viscount Horatio, 1758–1805, British admiral.
- volumetric displacement — the volume of air per revolution that passes through a mechanical pump when the pressure at the intake and the exhaust is the same as that of the atmosphere
- weak accumulation point — accumulation point.
- wind cave national park — a national park in SW South Dakota. 41½ sq. mi. (107 sq. km).
- yellow-headed blackbird — a North American blackbird, Xanthocephalus xanthocephalus, having a yellow head.