13-letter words containing i, r, a
- acting career — a person's career as an actor
- actinomorphic — (esp of a flower) having radial symmetry, as buttercups
- 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.
- active centre — the region in an enzyme molecule in which the reactive groups that participate in its action are juxtaposed
- active filter — An active filter is any filter using an op amp.
- active matrix — a liquid crystal display in which each pixel is individually controlled to provide a sharp image at a wide viewing angle; it is used in laptop and notebook computers
- 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.
- active-matrix — of or relating to a high-resolution liquid-crystal display (LCD) with high contrast, the most common type of flat-panel display.
- acupuncturist — An acupuncturist is a person who performs acupuncture.
- acylcarnitine — (organic chemistry) Any ester of carnitine and a carboxylic acid (especially a fatty acid).
- adam's bridge — a chain of shoals in the Gulf of Mannar between NW Sri Lanka and SE India; ownership divided between Sri Lanka and India. 30 miles (48 km) long.
- additive-free — (of food) not containing any chemical additives
- adjutant bird — either of two large carrion-eating storks, Leptoptilos dubius or L. javanicus, which are closely related and similar to the marabou and occur in S and SE Asia
- admensuration — Admeasurement.
- administerial — of or concerned with administration; administrative: administerial matters.
- administering — to manage (affairs, a government, etc.); have executive charge of: to administer the law.
- administrable — able to be administered or managed
- administrador — (historical) A steward or official in various Spanish- and Portuguese-speaking countries.
- administrated — to administer.
- administrates — Third-person singular simple present indicative form of administrate.
- administrator — An administrator is a person whose job involves helping to organize and supervise the way that an organization or institution functions.
- administrivia — Administrative details that must be dealt with in order to do more interesting work.
- admirableness — admirability
- admiralty law — maritime law.
- adumbratively — In an adumbrative manner.
- advance ratio — the ratio of wind speed along the axis of a rotor or propeller to the speed of the blade tip
- adventuristic — relating to adventurism
- adversarially — In an adversarial way.
- adversariness — the state of being adversarial
- adversatively — in an adversative manner
- advertisement — An advertisement is an announcement in a newspaper, on television, or on a poster about something such as a product, event, or job.
- advertizement — a paid announcement, as of goods for sale, in newspapers or magazines, on radio or television, etc.
- aerial camera — a camera used to take pictures from the air
- aerial ladder — a power-operated extending ladder mounted on a fire engine
- aerial survey — a survey carried out from the air, using an aeroplane or helicopter
- aerial tanker — an aircraft used to transport fuel or water
- aeroacoustics — the study of the generation and transmittance of sound by fluid flow
- aerodigestive — of or relating to the organs and tissues of the respiratory tract and the upper part of the digestive tract
- aerodontalgia — a toothache caused by lowered barometric pressure, as in high-altitude flight.
- aerodynamical — relating to aerodynamics
- aeroembolisms — Plural form of aeroembolism.
- aerolithology — the science of aerolites
- aeromagnetics — the science of measuring magnetic characteristics associated with atmospheric conditions of the earth.
- aeromechanics — the mechanics of gases, esp air
- aeromodelling — the making and flying of model planes
- aerophilately — the study or collection of airmail stamps, cancellations, etc.
- aerosinusitis — inflammation of the nasal sinuses caused by the effect on the sinuses of changes in atmospheric pressure.