13-letter words containing o, c, t, a
- actinobiology — the branch of biology concerned with the effects of radiation on living organisms
- actinomorphic — (esp of a flower) having radial symmetry, as buttercups
- actinomycetes — Plural form of actinomycete.
- actinomycosis — a fungal disease of cattle and of cats and dogs, sometimes transmitted to humans esp by bites, characterized by a swelling of the affected part, most often the jaw or lungs
- actinotherapy — radiotherapy, especially using ultraviolet rays.
- actinouranium — the isotope of uranium that has a mass number of 235
- action figure — a small figure of a character from a film, television programme, comic book etc, designed as a toy and often collected by enthusiasts
- action replay — An action replay is a repeated showing, usually in slow motion, of an event that has just been on television.
- action-packed — full of activities, events and excitement
- actionability — furnishing ground for a lawsuit.
- active object — (programming) An object each instance of which has its own thread running as well as its own copies of the object's instance variables.
- active optics — a system to compensate for any deformation caused by gravity in the surface accuracy and alignment of the mirrors of an astronomical telescope by means of actuators that control the movable mirror supports
- active reason — an activity of intellect, embodying universal truth, potentially present in the mind of every individual, and when present, forming the only immortal part of the individual.
- actor-manager — a leading actor who produces and usually stars in his or her own productions: Sir Henry Irving was one of the first actor-managers.
- actualisation — Alternative spelling of actualization.
- actualization — the act or process of actualizing.
- adenoidectomy — surgical removal of the adenoids
- adjudications — Plural form of adjudication.
- adrenalectomy — the surgical removal of one or both adrenal glands
- adultolescent — a young adult or middle-aged person who has interests, traits, etc., that are usually associated with teenagers.
- advance ratio — the ratio of wind speed along the axis of a rotor or propeller to the speed of the blade tip
- advection fog — fog caused by the movement of warm, moist air over a cold surface.
- advocacy tank — a research and development institution that works to lobby government officials to adopt the institution's viewpoints.
- aeroacoustics — the study of the generation and transmittance of sound by fluid flow
- aeromagnetics — the science of measuring magnetic characteristics associated with atmospheric conditions of the earth.
- aerostructure — any separately manufactured unit, component, or section of an aircraft or other vehicle capable of flight
- affectionally — In an affectional manner.
- affectionated — Simple past tense and past participle of affectionate.
- affectionless — showing no affection or kindly disposition towards
- agonistically — in an agonistic manner
- agrobacterium — A soil bacterium, of the genus Agrobacterium, which can fix nitrogen, and causes the formation of crown galls in plants.
- agroecologist — One who studies agroecology.
- ahistorically — In an ahistorical way.
- air injection — injection of liquid fuel into the cylinder of an internal-combustion engine, especially a diesel, by means of a jet of compressed air.
- air-condition — to apply air conditioning to
- aircraftwoman — The female equivalent of an aircraftman.
- aircraftwomen — Plural form of aircraftwoman.
- aius locutius — a disembodied voice that warned the Romans of a coming invasion by the Gauls.
- alcohol patch — a patch impregnated with the drug mecamylamine, which is worn on the skin by someone trying to reduce his or her craving for alcohol
- alcoholometer — an instrument, such as a specially calibrated hydrometer, for determining the percentage of alcohol in a liquid
- alcoholometry — the process of measuring the concentration of alcohol in a liquid, such as in blood or a liquor
- alectryomancy — an ancient form of divination, using a rooster to select grains of food placed on letters of the alphabet.
- allochromatic — Physical Chemistry. pertaining to or having photochemical properties resulting from an impurity or from exposure to radiation.
- allochthonous — (of rocks, deposits, etc) found in a place other than where they or their constituents were formed
- allotypically — in the manner of an allotype
- allowable cut — the amount of a natural resource, as grain or oil, that may be harvested or taken from the earth within a specified period, as limited by law for conservation.
- alphabet code — a list of easily distinguishable words, each representing a letter of the alphabet, used in radio and telephonic communications.
- altered chord — a chord in which one or more notes are chromatically changed by the introduction of accidentals
- alumosilicate — (inorganic chemistry) The anion [AlSiO4]-1.
- amarantaceous — amaranthine