19-letter words containing a, u, t, o, c
- traffic regulations — rules designed to expedite the flow of traffic and prevent collisions
- training instructor — a person who teaches people the skills they need for a particular field or profession
- tuamotu archipelago — a group of about 80 coral islands in the S Pacific, in French Polynesia. Pop: 15 973 (2002; including the Gambier Islands). Area: 860 sq km (332 sq miles)
- tussock caterpillar — the larva of a tussock moth.
- ultramicrochemistry — the branch of microchemistry dealing with minute quantities of material weighing one microgram or less.
- ultrasonic cleaning — the use of ultrasound to vibrate a piece to be cleaned while the piece is immersed in a cleaning fluid. The process produces a very high degree of cleanliness, and is used for jewellery and ornately shaped items
- unconstitutionality — not constitutional; unauthorized by or inconsistent with the constitution, as of a country.
- under consideration — being deliberated
- vacuum distillation — a process of distillation employing a vacuum that by lowering the pressure on a liquid allows volatilization at a lower temperature than normal.
- vaginal intercourse — intercourse involving insertion of the penis into the vagina
- valencian community — region comprising three provinces of E Spain: 8,998 sq mi (23,305 sq km); pop. 4,029,000; cap. Valencia
- vapor recovery unit — A vapor recovery unit is a system for recovering vapors from inside sealed crude oil or condensate tanks, with a scrubber (= a device for removing unwanted substances) and compressor (= a device that raises pressure).
- velocity modulation — the modulation in velocity of a beam of electrons or ions caused by passing the beam through a high-frequency electric field, as in a cavity resonator
- victor emmanuel iii — 1869–1947, king of Italy 1900–46.
- vinculum matrimonii — the bond of matrimony.
- vocational guidance — the process of assisting a student to choose, prepare for, and enter an occupation for which he or she shows aptitude.
- volumetric analysis — determination of the concentration, by volume, of a substance in a solution, as by titration.
- what-do-you-call-it — whachamacallit.
- young conservatives — the youth section of the United Kingdom Conservative Party until 1998
- zero-hours contract — an employment contract which does not oblige the employer to provide regular work for the employee, but requires the employee to be on call in the event that work becomes available