22-letter words containing a, d, u
- unilateral disarmament — disarmament, especially nuclear disarmament, carried out by one state on its own
- united empire loyalist — any of the American colonists who settled in Canada during or after the War of American Independence because of loyalty to the British Crown
- universal product code — a bar code that indicates price, product classification, etc., and can be read electronically, as at checkout counters in supermarkets. Abbreviation: UPC.
- unprofessional conduct — activity that is contrary to the accepted code of conduct of a profession
- unsaturated production — Unsaturated production is the production of smaller, unsaturated hydrocarbons from saturated hydrocarbons, for example producing alkenes such as ethane and propene.
- urban development zone — an area that is designated as being a site for urban development
- urban district council — a council of an urban district that, in conjunction with a county council, has responsibilities for local government issues
- user datagram protocol — (protocol) (UDP) Internet standard network layer, transport layer and session layer protocols which provide simple but unreliable datagram services. UDP is defined in STD 6, RFC 768. It adds a checksum and additional process-to-process addressing information [to what?]. UDP is a connectionless protocol which, like TCP, is layered on top of IP. UDP neither guarantees delivery nor does it require a connection. As a result it is lightweight and efficient, but all error processing and retransmission must be taken care of by the application program.
- van der waals equation — an equation of state relating the pressure, volume, and absolute temperature of a gas, taking into account the finite size of the molecules and the attractive force between them.
- wardour street english — affectedly archaic speech or writing
- water under the bridge — If you say that an event or incident is water under the bridge, you mean that it has happened and cannot now be changed, so there is no point in worrying about it any more.
- west greenland current — an ocean current flowing northward along the west coast of Greenland.
- what can/do you expect — You can say 'What can you expect?' or 'What do you expect?' to emphasize that there is nothing surprising about a situation or a person's behaviour, especially if you find this disappointing.
- world communion sunday — the first Sunday in October, during which members of ecumenical churches throughout the world celebrate Holy Communion, especially to affirm their unity in Christ.