12-letter words containing r, o, t, a, u
- hard-mouthed — of or relating to a horse not sensitive to the pressure of a bit.
- harmoniumist — a person who plays a harmonium
- herpetofauna — the reptiles and amphibians that inhabit a given area
- heterogamous — Genetics. having unlike gametes, or reproducing by the union of such gametes (opposed to isogamous).
- heteroousian — a person who believes the Father and the Son to be unlike in substance or essence; an Arian (opposed to Homoousian).
- heterosexual — of, relating to, or exhibiting heterosexuality.
- hippocentaur — Centaur.
- holothurians — Plural form of holothurian.
- house arrest — confinement of an arrested person to his or her residence or to a public place, as a hospital, instead of in a jail: He was under house arrest until the day of his trial.
- house martin — a small European swallow, Delichon urbica, that builds its nest under the eaves of houses.
- housefathers — Plural form of housefather.
- housemasters — Plural form of housemaster.
- housepainter — A professional painter of houses.
- housetrained — Simple past tense and past participle of housetrain.
- hydronautics — (nautical) The science of the design and construction of ships, their engines, and their instrumentation.
- hydrosulfate — a salt formed by the direct union of sulfuric acid with an organic base, especially an alkaloid, and usually more soluble than the base.
- hypogastrium — the lower and median part of the abdomen.
- ichthyosaurs — Plural form of ichthyosaur.
- idolatrously — In an idolatrous manner.
- illuminators — Plural form of illuminator.
- illuminatory — Increasing informative qualities; explanatory.
- illustration — something that illustrates, as a picture in a book or magazine.
- illustrators — Plural form of illustrator.
- illustratory — Serving to illustrate.
- import quota — the maximum amount of a product that can be imported into a country within a given period of time
- in-and-outer — a person who is by turns in and out of a particular situation, condition, venture, investment, etc.
- inauguration — an act or ceremony of inaugurating.
- inauguratory — Inaugural; being the first instance.
- incrustation — an incrusting or being incrusted.
- infraduction — (medicine) The turning downward of a part, especially of the eye.
- inhalatorium — a room or building in which vapours are breathed in
- inoperculate — having no operculum.
- inquartation — (in assaying) the addition of silver to a gold-silver alloy in order to facilitate the parting of the gold by nitric acid.
- instauration — renewal; restoration; renovation; repair.
- interacinous — situated between the acini of a gland or lung.
- interlobular — (anatomy) Between lobules.
- interlocular — having one or more locules.
- interspousal — Often, spousals. the ceremony of marriage; nuptials.
- intraosseous — (medicine) within a bone.
- intraveneous — Misspelling of intravenous.
- iron curtain — (sometimes initial capital letters) a barrier to understanding and the exchange of information and ideas created by ideological, political, and military hostility of one country toward another, especially such a barrier between the Soviet Union and its allies and other countries.
- iron sulfate — ferrous sulfate.
- isosthenuria — the inability of the kidneys to dilute or concentrate urine
- jocularities — the state or quality of being jocular.
- joint author — a person who shares the writing of a book, article, etc, with another
- journalistic — of, relating to, or characteristic of journalists or journalism.
- judicatories — Plural form of judicatory.
- k/t boundary — Cretaceous/Tertiary boundary: the time zone comprising the end of the Cretaceous and the beginning of the Tertiary periods
- katharevousa — The purist form of modern Greek used in traditional literary writing, as opposed to the form that is spoken and used in everyday writing (called demotic).
- keratogenous — producing horn or a horny substance.