21-letter words containing a, t, i, v
- 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).
- displacement activity — a behavior performed out of its usual context and apparently irrelevant to the prevailing situation, as eating when an unknown individual approaches, tending to occur when appropiate behaviors, as attacking or fleeing, are in conflict or obstructed.
- display advertisement — an advertisement designed to attract attention by using devices such as conspicuous or elegant typefaces, graphics, etc
- 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
- earthmoving equipment — machines, such as bulldozers, that are used for excavating and moving large quantities of earth
- environmental studies — a university course studying the environment and related issues
- ethernet private line — (networking) (EPL) A data service defined by the Metro Ethernet Forum, providing a point-to-point Ethernet connection between a pair of dedicated User-Network Interfaces (UNIs), with a high degree of transparency.
- extensible vax editor — (text, tool) (EVE) A DEC product implemented using DEC's Text Processing Utility (TPU).
- first-dollar coverage — insurance that provides payment for the full loss up to the insured amount with no deductibles.
- flat-coated retriever — one of an English breed of large sporting dogs having a flat, dense, shiny black or liver-colored coat, small ears, and long jaws, used for retrieving game from both water and land.
- food conversion ratio — a ratio expressing the weight of food required to produce a unit gain in the live weight of an animal
- fraudulent conversion — conversion committed with the intent to defraud
- functional imperative — a requirement for the survival of any social system, as communication, control of conflict, or socialization.
- generic type variable — (programming) (Also known as a "schematic type variable"). Different occurrences of a generic type variable in a type expression may be instantiated to different types. Thus, in the expression let id x = x in (id True, id 1) id's type is (for all a: a -> a). The universal quantifier "for all a:" means that a is a generic type variable. For the two uses of id, a is instantiated to Bool and Int. Compare this with let id x = x in let f g = (g True, g 1) in f id This looks similar but f has no legal Hindley-Milner type. If we say f :: (a -> b) -> (b, b) this would permit g's type to be any instance of (a -> b) rather than requiring it to be at least as general as (a -> b). Furthermore, it constrains both instances of g to have the same result type whereas they do not. The type variables a and b in the above are implicitly quantified at the top level: f :: for all a: for all b: (a -> b) -> (b, b) so instantiating them (removing the quantifiers) can only be done once, at the top level. To correctly describe the type of f requires that they be locally quantified: f :: ((for all a: a) -> (for all b: b)) -> (c, d) which means that each time g is applied, a and b may be instantiated differently. f's actual argument must have a type at least as general as ((for all a: a) -> (for all b: b)), and may not be some less general instance of this type. Type variables c and d are still implicitly quantified at the top level and, now that g's result type is a generic type variable, any types chosen for c and d are guaranteed to be instances of it. This type for f does not express the fact that b only needs to be at least as general as the types c and d. For example, if c and d were both Bool then any function of type (for all a: a -> Bool) would be a suitable argument to f but it would not match the above type for f.
- give a horse its head — to allow a horse to gallop by lengthening the reins
- give place to someone — to make room for or be superseded by someone
- give sb a green light — If someone in authority gives you a green light, they give you permission to do something.
- give sb the runaround — If someone gives you the runaround, they deliberately do not give you all the information or help that you want, and send you to another person or place to get it.
- give someone a tinkle — to call someone on the telephone
- give someone the gate — a movable barrier, usually on hinges, closing an opening in a fence, wall, or other enclosure.
- government in waiting — a political group which is hoping to be elected to govern in the near future
- great victoria desert — a desert in SW central Australia. 125,000 sq. mi. (324,000 sq. km).
- greenwich observatory — the national astronomical observatory of Great Britain, housed in a castle in E Sussex; formerly located at Greenwich.
- happy little vegemite — a person who is in good humour
- have it coming to one — to deserve what one is about to suffer
- have one's hands tied — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- have the inside track — If you say that someone has the inside track, you mean that they have an advantage, for example special knowledge about something.
- home improvement loan — a government loan for house improvements such as insulation, adding a bathroom, or urgent repairs
- human rights activist — a person who campaigns for human rights
- in favor/out of favor — If someone or something is in favor, people like or support them. If they are out of favor, people no longer like or support them.
- induced radioactivity — artificial radioactivity.
- industrial revolution — (sometimes initial capital letters) the totality of the changes in economic and social organization that began about 1760 in England and later in other countries, characterized chiefly by the replacement of hand tools with power-driven machines, as the power loom and the steam engine, and by the concentration of industry in large establishments.
- inflationary universe — a version of the big bang theory in which the universe underwent very rapid growth during the first fraction of a second before it settled down to its current rate of expansion.
- information retrieval — the systematic storage and recovery of data, as from a file, card catalog, or the memory bank of a computer. Abbreviation: IR.
- internal jugular vein — Anatomy. a jugular vein.
- intravenous drug user — a drug addict who injects drugs (esp heroin) intravenously
- investment management — the process of managing business investments
- java native interface — (programming) (JNI) A native programming interface for Java that allows Java code running inside a Java Virtual Machine to interoperate with applications and libraries written in other programming languages such as C, C++ and assembly language.
- junior varsity sports — sports played at the second highest rank for university sports, ranking first after varsity
- kekule von stradonitz — Friedrich August [free-drikh ou-goo st] /ˈfri drɪx ˈaʊ gʊst/ (Show IPA), 1829–96, German chemist.
- lafcadio's adventures — French Les Caves du Vatican. a novel (1914) by André Gide.
- leave holding the bag — a container or receptacle of leather, plastic, cloth, paper, etc., capable of being closed at the mouth; pouch.
- leave sb in the lurch — If someone leaves you in the lurch, they go away or stop helping you at a very difficult time.
- light armored vehicle — an eight-wheeled armored reconnaissance car with a 25mm cannon, in service with the U.S. Army and Marine Corps in the 1980s.
- live to tell the tale — If you survive a dangerous or frightening experience and so are able to tell people about it afterwards, you can say that you lived to tell the tale.
- magneto-optical drive — magneto-optical disk
- mauvais quart d'heure — a brief unpleasant experience
- maximum value theorem — the theorem that for a real-valued function f whose domain is a compact set, there is at least one element x in the domain of f for which f (x) achieves its largest value.
- mean square deviation — variance (def 3).