13-letter words containing a, c, o, u
- dolichosaurus — any of various extinct Cretaceous aquatic reptiles that had long necks and bodies and well-developed limbs
- domical vault — cloistered vault.
- doomsday cult — A doomsday cult is a religious cult whose members believe that the world is about to end.
- double tackle — a pulley system using blocks having two grooved wheels.
- double-acting — (of a reciprocating engine, pump, etc.) having pistons accomplishing work in both directions, fluid being admitted alternately to opposite ends of the cylinders. Compare single-acting.
- double-action — (of a firearm) requiring only one pull of the trigger to cock and fire it.
- douglas scale — an international scale of sea disturbance and swell ranging from 0 to 9 with one figure for disturbance and one for swell
- dual controls — If a vehicle used by a driving instructor has dual controls, it has pedals on the passenger's side as well as on the driver's side to allow the driving instructor to brake should the learner try to move off when it is dangerous to do so
- dual monarchy — the kingdom of Austria-Hungary 1867–1918.
- dutch auction — a method of auction consisting in the offer of a property at a price above the actual value and then at gradually reduced prices until a buyer is found.
- dutch courage — courage inspired by drunkenness or drinking liquor.
- dysfunctional — not performing normally, as an organ or structure of the body; malfunctioning.
- eccremocarpus — any plant of the evergreen climbing genus Eccremocarpus, esp E. scaber, grown for its decorative pinnate foliage and bright orange-red bell flowers: family Bignoniaceae
- educationally — pertaining to education.
- educationists — Plural form of educationist.
- efficaciously — capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough.
- encapsulation — The act of enclosing in a capsule; the growth of a membrane around (any part) so as to enclose it in a capsule.
- encourageable — Able to be encouraged; suggestible.
- encouragement — The action of giving someone support, confidence, or hope.
- encouragingly — In an encouraging manner.
- encrustations — Plural form of encrustation.
- enculturation — The gradual acquisition of the characteristics and norms of a culture or group by a person, another culture, etc.
- endonucleases — Plural form of endonuclease.
- equimolecular — (chemistry) Containing the same number of molecules (of two or more compounds).
- equinoctially — In an equinoctial manner; relative to the equinox.
- equisetaceous — belonging to the family Equisetaceae
- equivocalness — The state of being equivocal; ambiguity.
- equivocations — Plural form of equivocation.
- eta reduction — eta conversion
- ethnocultural — Relating to or denoting a particular ethnic group.
- eudaemonistic — Of or pertaining to eudaemonism.
- excommunicate — Officially exclude (someone) from participation in the sacraments and services of the Christian Church.
- facetiousness — (uncountable) The state of being facetious.
- faculty board — the governing body of a faculty
- false colours — a flag to which one is not entitled, flown esp in order to deceive
- fasciculation — a fascicular condition.
- feature shock — (jargon) (From Alvin Toffler's "Future Shock") A user's confusion when confronted with a package that has too many features and poor introductory material.
- federal court — a court of a federal government, especially one established under the Constitution of the United States.
- fibromuscular — (anatomy) Of or pertaining to both fibrous and muscular tissue.
- fibrovascular — composed of fibrous and conductive tissue, as in the vascular systems of higher plants: a fibrovascular bundle.
- flag of truce — a white flag displayed as an invitation to the enemy to confer, or carried as a sign of peaceful intention by one sent to deal with the enemy.
- floatcut file — file with rows of parallel teeth
- floor furnace — a small self-contained furnace placed just below the floor of the space to be heated.
- floricultural — Of or pertaining to floriculture.
- fluctuational — Of, pertaining to, or resulting from fluctuation(s).
- fluoroacetate — a toxic chemical compound, C2H2FNaO2, occurring naturally in certain plants, and commonly used as rat poison
- fluorocarbons — Plural form of fluorocarbon.
- fluorographic — of or pertaining to fluorography
- fluoroplastic — any of the plastics, as Teflon, in which hydrogen atoms of the hydrocarbon chains are replaced by fluorine atoms.
- focal seizure — an epileptic manifestation arising from a localized anomaly in the brain, as a small tumor or scar, and usually involving a single motor or sensory mechanism but occasionally spreading to other areas and causing convulsions and loss of consciousness.