21-letter words containing a, s, o
- decompression chamber — a chamber in which the pressure of air can be varied slowly for returning people from abnormal pressures to atmospheric pressure without inducing decompression sickness
- delusions of grandeur — If someone has delusions of grandeur, they think and behave as if they are much more important or powerful than they really are.
- democratic centralism — the Leninist principle that policy should be decided centrally by officials, who are nominally democratically elected
- denominational school — a school associated with a particular religious denomination
- department of defense — the department of the U.S. federal government charged with ensuring that the military capacity of the U.S. is adequate to safeguard the national security. Abbreviation: DOD.
- department of justice — the department of the U.S. federal government charged with the responsibility for the enforcement of federal laws. Abbreviation: DOJ.
- deprovincialization's — to make provincial in character.
- designated employment — (in Britain) any of certain kinds of jobs reserved for handicapped workers under the Disabled Persons (Employment) Act 1944
- diapason normal pitch — a standard of pitch in which A above middle C is established at 435 vibrations per second.
- digital videocassette — a videocassette containing magnetic tape used for high-fidelity digital recording or playback of video. Abbreviation: DVC.
- disassortative mating — the reproductive pairing of individuals that have traits more dissimilar than would likely be the case if mating were random (contrasted with assortative mating).
- discretionary account — an account in which the stockbroker is allowed complete control over the purchase and sale of securities on the customer's behalf.
- discriminant function — a linear function of measurements of different properties of an object or event that is used to assign the object or event to one population or another (discriminant analysis)
- disk operating system — DOS.
- dissociative disorder — a mental disorder, as multiple personality, characterized by sudden temporary alteration in consciousness, identity, or motor behavior.
- distinctiveness ratio — the ratio of the relative frequency of some event in a given sample to that in the general population or another relevant sample
- double predestination — the doctrine that God has foreordained both those who will be saved and those who will be damned.
- double spanish burton — a tackle having one standing block and two running blocks, giving a mechanical advantage of five, neglecting friction.
- downhole safety valve — A downhole safety valve is a piece of safety equipment used inside a well, which isolates wellbore pressure and fluid if something bad happens.
- draft once reuse many — (jargon) (DORUM) Reusing parts of a document to produce parts of an entirely new document. The term normally refers to text documents but the practise is equally common in programming.
- drop in someone's lap — give someone the responsibility of
- duccio di buoninsegna — c1255–1319? Italian painter.
- dumfries and galloway — a region in S Scotland. 2460 sq. mi. (6371 sq. km).
- dusky seaside sparrow — a species of sparrow, Ammospiza maritima, existing in two subspecies, one (Cape Sable seaside sparrow) having dark olive-drab plumage with a lighter breast and underbelly, and the other (dusky seaside sparrow) having bold black and white markings on the breast and underbelly: the dusky seaside sparrow is almost extinct.
- easier said than done — difficult to do
- eastern european time — a standard time used by some countries in Eastern Europe, such as Finland, Romania, etc and also some countries of the Middle East and North Africa
- eccles-jordan circuit — flip-flop
- ecological succession — succession (def 6).
- ecological-succession — the coming of one person or thing after another in order, sequence, or in the course of events: many troubles in succession.
- educational sociology — the application of sociological principles and methods to the solution of problems in an educational system.
- electroencephalograms — Plural form of electroencephalogram.
- electromagnetic pulse — a surge of electromagnetic radiation, esp one resulting from a nuclear explosion, which can disrupt electronic devices and, occasionally, larger structures and equipment
- electronystagmography — A diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system.
- emotional correctness — pressure on an individual to be seen to feel the same emotion as others
- endoplasmic reticulum — an extensive intracellular membrane system whose functions include synthesis and transport of lipids and, in regions where ribosomes are attached, of proteins
- environmental studies — a university course studying the environment and related issues
- epidermolysis bullosa — type of genetic skin disorder
- ethics of the fathers — a treatise of the Mishnah that comprises six chapters and consists chiefly of proverbs, aphorisms, and principles of ethics, law, and religion.
- european space agency — an organization dedicated to space exploration with 18 European countries as members
- every dog has his day — one's luck will come
- exposure compensation — the act of overriding a camera's automatic exposure in order to achieve a particular effect or due to difficult lighting conditions
- extensible vax editor — (text, tool) (EVE) A DEC product implemented using DEC's Text Processing Utility (TPU).
- fall all over oneself — to drop or descend under the force of gravity, as to a lower place through loss or lack of support.
- false memory syndrome — a psychological condition in which a person believes that he or she remembers events that have not actually occurred.
- false-memory syndrome — a psychological condition in which a person believes that he or she remembers events that have not actually occurred.
- federal reserve board — a U.S. federal banking system that is under the control of a central board of governors (Federal Reserve Board) with a central bank (Federal Reserve Bank) in each of 12 districts and that has wide powers in controlling credit and the flow of money as well as in performing other functions, as regulating and supervising its member banks.
- fermat's last theorem — the unproved theorem that the equation xn + yn = zn has no solution for x, y, z nonzero integers when n is greater than 2.
- ferric sodium oxalate — an emerald-green, crystalline, extremely water-soluble salt, used in photography and blueprinting.
- finite state automata — Finite State Machine
- first baron ashburton — Alexander, 1st Baron Ashburton, 1774–1848, British statesman.