21-letter words containing a, n, o, i

host command facility — (operating system) (HCF) Used to access IBM S/36 and AS/400 computers from a mainframe.
hubble classification — a method of classifying galaxies depending on whether they are elliptical, spiral, barred spiral, or irregular
human papilloma virus — a species of virus that causes genital warts. Abbreviation: HPV.
humanistic psychology — an approach to psychology that emphasizes emotions and the better understanding of the self in terms of observation of oneself and one's relations with others
hyperlipoproteinaemia — the condition of having an abnormally high level of lipoproteins in the blood
hypogammaglobulinemia — A type of immune disorder characterised by a reduction in all types of gamma globulins.
hysterosalpingography — (medicine) X-ray examination of the uterus and oviducts following injection of a radiopaque substance.
i don't know how/what — You use I don't know in expressions which indicate criticism of someone's behaviour. For example, if you say that you do not know how someone can do something, you mean that you cannot understand or accept them doing it.
identical proposition — a proposition in which the subject and predicate have the same meaning, as, “That which is mortal is not immortal.”.
identification papers — documents that serve to establish someone's identity
identification parade — a group of persons including one suspected of having committed a crime assembled for the purpose of discovering whether a witness can identify the suspect
ilya ilyich mechnikov — Élie [French ey-lee] /French eɪˈli/ (Show IPA), (Ilya Ilyich Mechnikov) 1845–1916, Russian zoologist and bacteriologist in France: Nobel Prize in medicine 1908.
immaculate conception — the dogma of the unique privilege by which the Virgin Mary was conceived in her mother's womb without the stain of original sin through the anticipated merits of Jesus Christ. Compare virgin birth (def 1).
immediate constituent — one of the usually two largest constituents of a construction: The immediate constituents of He ate his dinner are he and ate his dinner; of ate his dinner are ate and his dinner; etc. Abbreviation: IC.
immunohistochemically — By means of or in regard to immunohistochemistry.
in (or out of) phase — in (or not in) a state of exactly parallel movements, oscillations, etc.; in (or not in) synchronization
in (or out of) place — in (or out of) the customary, proper, or assigned place
in a class of its own — unequalled; unparalleled
in a state of undress — If someone is in a state of undress, they do not have all their clothes on.
in bad/good/etc taste — If you say that something that is said or done is in bad taste or in poor taste, you mean that it is offensive, often because it concerns death or sex and is inappropriate for the situation. If you say that something is in good taste, you mean that it is not offensive and that it is appropriate for the situation.
in co-ordination with — If you do something in co-ordination with someone else, you both organize your activities so that you work together efficiently.
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.
in good circumstances — (of a person) in a good financial situation
in more ways than one — You say in more ways than one to indicate that what you have said is intended to have more than one meaning.
in no uncertain terms — If you say that someone tells a person something in no uncertain terms, you are emphasizing that they say it strongly and clearly so that there is no doubt about what they mean.
in phase/out of phase — If two things are out of phase with each other, they are not working or happening together as they should. If two things are in phase, they are working or occurring together as they should.
in saecula saeculorum — for ever and ever.
in-complete dominance — the appearance in a heterozygote of a trait that is intermediate between either of the trait's homozygous phenotypes.
indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
indigenous australian — another name for Aboriginal and Torres Strait Islander
indo-australian plate — a major tectonic division of the earth's crust, comprising India and the Australian continent and adjacent suboceanic basins (the Tasman, South Australian, Mid-Indian, Cocos, and Australian basins); separated from the Eurasian Plate by the Java Trench, from the Pacific Plate by the Tonga-Kermadec Trench, and from the African Plate by a series of mid-ocean ridges (the Carlsberg, Mid-Indian, and Southeast Indian ridges).
induced radioactivity — artificial radioactivity.
industrial misconduct — behaviour by an employee that is considered to be negligent or irregular to such an extent that disciplinary action may be taken, usually by agreement between management and the employee's representatives
industrial psychology — the application of psychological principles and techniques to business and industrial problems, as in the selection of personnel or development of training programs.
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.
infant mortality rate — number of babies dying
infectious ectromelia — ectromelia (def 2).
infiltration capacity — the maximum rate at which a soil in a given condition will absorb water.
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 appliance — (hardware) (IA) A consumer device that performs only a few targeted tasks and is controlled by a simple touch-screen interface or push buttons on the device's enclosure.
information gathering — the process of collecting information about something
information retrieval — the systematic storage and recovery of data, as from a file, card catalog, or the memory bank of a computer. Abbreviation: IR.
information scientist — someone who works in information science
innateness hypothesis — the theory that humans are biologically equipped with a knowledge of certain universal elements of language structure that is brought into play in the course of native-language acquisition.
input-output analysis — an analysis of production relationships between the industries of an economy involving a study of each industry's inputs and outputs, esp as used in social accounting
insulin shock therapy — a former treatment for mental illness, especially schizophrenia, employing insulin-induced hypoglycemia as a method for producing convulsive seizures.
integer specbaseratio — SPECbase_int92
intellectual property — Law. property that results from original creative thought, as patents, copyright material, and trademarks.
intentional community — a community designed and planned around a social ideal or collective values and interests, often involving shared resources and responsibilities.
international brigade — a military force that fought on the Republican side in the Spanish Civil War, consisting of volunteers (predominantly socialists and communists) from many countries

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