13-letter words containing a, u, t, o
- heart trouble — cardiac condition
- heat equation — a partial differential equation the solution of which gives the distribution of temperature in a region as a function of space and time when the temperature at the boundaries, the initial distribution of temperature, and the physical properties of the medium are specified.
- hematophagous — feeding on blood, as the vampire bat.
- hepatojugular — (medicine) Relating to the liver and the jugular vein.
- heterocarpous — (of a plant) producing more than one type of fruit
- heterosexuals — Plural form of heterosexual.
- hexadactylous — hexadactylic
- hexamethonium — a compound, C 10 H 24 N 2 , used in the treatment of severe hypertension to lower blood pressure and increase blood flow by blocking transmission of nerve impulses that constrict blood vessels.
- hippo zarytus — ancient name of Bizerte.
- holy saturday — the Saturday in Holy Week.
- holy thursday — Ascension Day.
- homosexuality — sexual desire or behavior directed toward a person or persons of one's own sex.
- honourability — A state or condition or being honourable.
- horticultural — the cultivation of a garden, orchard, or nursery; the cultivation of flowers, fruits, vegetables, or ornamental plants.
- hothouse lamb — a lamb born in the fall or early winter, usually reared indoors, specially fed, and marketed when from 9 to 16 weeks of age.
- house painter — a person whose occupation is painting houses.
- house trailer — a trailer fitted with accommodations for sleeping, eating, washing, etc.
- house-trained — housebroken.
- household art — any of the skills necessary to the efficient running of a household, as cooking or keeping a family budget.
- housepainters — Plural form of housepainter.
- 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.
- humboldt peak — a mountain in S Colorado, in the Sangre de Cristo range. 14,064 feet (4290 meters).
- hunt saboteur — A hunt saboteur is someone who tries to stop a hunt from taking place or being successful because they believe it is cruel to the animal being hunted.
- hydrofracture — (geology) Rock fracture caused by the pressure of freezing water.
- hydrosulphate — a salt formed by the direct union of sulfuric acid with an organic base, especially an alkaloid, and usually more soluble than the base.
- hypercautious — Especially or unreasonably cautious.
- hypermutation — (uncountable) Frequent mutation.
- hyposexuality — A significantly low level of sexuality.
- hyracotherium — eohippus.
- hysteranthous — relating to a plant whose flowers open before its leaves
- ichthyofaunal — relating to ichthyofauna
- ichthyosaurus — ichthyosaur.
- illocutionary — pertaining to a linguistic act performed by a speaker in producing an utterance, as suggesting, warning, promising, or requesting.
- illuminations — Plural form of illumination.
- illustrations — Plural form of illustration.
- immunisations — Plural form of immunisation.
- immunizations — Plural form of immunization.
- 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.
- impostumation — an abscess or swelling filled with pus
- in default of — If something happens in default of something else, it happens because that other thing does not happen or proves to be impossible.
- 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.
- incultivation — (obsolete) Want of cultivation.
- inculturation — enculturation.