13-letter words containing r, a, t, o, u, i
- housetraining — Present participle of housetrain.
- housing start — an instance of beginning the construction of a dwelling.
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- hypercautious — Especially or unreasonably cautious.
- hypermutation — (uncountable) Frequent mutation.
- hyracotherium — eohippus.
- ichthyosaurus — ichthyosaur.
- illocutionary — pertaining to a linguistic act performed by a speaker in producing an utterance, as suggesting, warning, promising, or requesting.
- illustrations — Plural form of illustration.
- immunotherapy — treatment designed to produce immunity to a disease or enhance the resistance of the immune system to an active disease process, as cancer.
- importunately — urgent or persistent in solicitation, sometimes annoyingly so.
- inaugurations — Plural form of inauguration.
- inclinatorium — an instrument invented by Robert Norman in 1576, used to determine the degree to which a magnetic needle dips towards the earth; a dipping needle
- inconstruable — unable to be construed
- incorruptable — Misspelling of incorruptible.
- incouragement — Archaic form of encouragement.
- inculturation — enculturation.
- ingurgitation — The act of swallowing greedily or immoderately; that which is so swallowed.
- inquisitorial — of or relating to an inquisitor or inquisition.
- instructional — the act or practice of instructing or teaching; education.
- insubordinate — not submitting to authority; disobedient: an insubordinate soldier.
- insupportable — not endurable; unbearable; insufferable: insupportable pain.
- insupportably — In an insupportable manner.
- insusurration — (obsolete) The act of whispering into something.
- intercommunal — used or shared in common by everyone in a group: a communal jug of wine.
- interlunation — the interlunar period.
- intermountain — located between mountains or mountain ranges: an intermontane lake.
- interneuronal — (neurology) Between neurons.
- interosculant — Mutually touching or intersecting.
- interosculate — to interpenetrate; inosculate.
- intraocularly — into or in the eye
- intravenously — through or within a vein. Abbreviation: IV.
- involuntarily — not voluntary; independent of one's will; not by one's own choice: an involuntary listener; involuntary servitude.
- involute gear — a gear tooth form that is generated by involute geometry
- isostructural — (of two substances) having the same crystal structure but not necessarily a similar chemical composition.
- jodhpuri coat — a coat worn by men in India, similar to but shorter than a sherwani
- junior rating — a military rank for non-officer personnel in the navy
- justificatory — serving to justify; providing justification.
- kilowatt-hour — a unit of energy, equivalent to the energy transferred or expended in one hour by one kilowatt of power; approximately 1.34 horsepower-hours. Abbreviation: kWh, K.W.H., kwhr.
- liquid storax — a solid resin with a vanillalike odor, obtained from a small tree, Styrax officinalis: formerly used in medicine and perfumery.
- literacy hour — (in England and Wales) a daily reading and writing lesson that was introduced into the national primary school curriculum in 1998 to raise standards of literacy
- logical truth — the property of being logically tautologous
- louis pasteur — Louis [loo-ee;; French lwee] /ˈlu i;; French lwi/ (Show IPA), 1822–95, French chemist and bacteriologist.
- lower austria — a province in NE Austria. 7092 sq. mi. (18,370 sq. km).
- lucretia mott — John Raleigh, 1865–1955, U.S. religious leader: Nobel Peace Prize 1946.
- lunar orbiter — one of a series of space probes that orbited and photographed the moon in 1966 and 1967.
- macromutation — a mutation that has a profound effect on the resulting organism, as a change in a regulatory gene that controls the expression of many structural genes.
- macronutrient — Nutrition. any of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
- magnetiferous — (dated) Producing or conducting magnetism.
- majority rule — the principle that decisions supported by more than half the people in a group have effect upon all the people in that group