21-letter words containing s, a, n, o, d
- sunday school teacher — someone who teaches at a Sunday school
- surface friction drag — the part of the drag on a body moving through a fluid that is dependent on the nature of the surface of the body
- surface-to-underwater — (of a missile, message, etc.) traveling from the surface of the earth to a target underwater.
- synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
- terrestrial radiation — long-wave electromagnetic radiation in the form of heat emitted from the earth's surface and atmosphere.
- the antipodes islands — a group of small uninhabited islands in the South Pacific, southeast of and belonging to New Zealand. Area: 62 sq km (24 sq miles)
- the assessment method — a way of providing evidence that students' knowledge and learning match the aims of a course
- the comrades marathon — an annual long-distance race run every year on the 16th of June from Durban to Pietermaritzburg, a distance of approximately 90 kilometres (56 miles)
- the women's land army — a unit of women recruited to do agricultural work in the United Kingdom during World War I and World War II
- thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
- time and motion study — the systematic investigation and analysis of the motions and the time required to perform a specific operation or task with a view to seeking more efficient methods of production as well as setting time standards.
- to be arrayed against — to be opposed to
- to be hard luck on sb — to be unfortunate or unlucky for someone
- to be in dire straits — to be in a position of acute difficulty
- to bend someone's ear — If you say that someone is bending your ear about something, you mean that they keep talking to you about it because they think it is important; used especially when you are irritated by this.
- to hit the bookstands — (of a book) to be published
- to play second fiddle — If you play second fiddle to someone, your position is less important than theirs in something that you are doing together.
- to risk life and limb — If someone risks life and limb, they do something very dangerous that may cause them to die or be seriously injured.
- trades union congress — The Trades Union Congress in Britain is the same as the TUC.
- under one's own steam — If you do something under your own steam, you do it without any help from anyone else.
- universal disk format — (storage, standard) (UDF) A CD-ROM file system standard that is required for DVD ROMs. UDF is the OSTA's replacement for the ISO 9660 file system used on CD-ROMs, but will be mostly used on DVD. DVD multimedia disks use UDF to contain MPEG audio and video streams. To read DVDs you need a DVD drive, the kernel driver for the drive, MPEG video support, and a UDF driver. DVDs containing both UDF filesystems and ISO 9660 filesystems can be read without UDF support. UDF can also be used by CD-R and CD-RW recorders in packet writing mode.
- university of iceland — (body, education) The Home of Fjolnir.
- up close and personal — face to face, intimately
- vasco nunez de balboa — Vasco Núñez de [bahs-kaw noo-nyeth th e] /ˈbɑs kɔ ˈnu nyɛθ ðɛ/ (Show IPA), 1475?–1517, Spanish adventurer and explorer who discovered the Pacific Ocean in 1513.
- vladivostok agreement — a preliminary arms control accord concluded by Soviet leader Leonid Brezhnev and U.S. President Gerald Ford in Vladivostok, U.S.S.R., in December 1974.
- washington's birthday — February 22, formerly observed as a legal holiday in most states of the U.S. in honor of the birth of George Washington.
- white-crowned sparrow — a North American sparrow, Zonotrichia leucophrys, having black and white stripes on the head.
- wholesale price index — an indicator of price changes in the wholesale market
- with one's bare hands — If someone does something with their bare hands, they do it without using any weapons or tools.
- word association test — a technique for determining a subject's associative pattern by providing a verbal stimulus to which a verbal response is required.
- word-association test — a psychological test in which the person being tested responds to a given word with the first word (or the first word in a specified category, such as an antonym) brought to mind
- xeroderma pigmentosum — a rare inherited disease characterized by sensitivity to ultraviolet light, exposure resulting in lesions and tumors of the skin and eyes.