13-letter words containing a, e, r, i
- 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.
- affenpinscher — a small wire-haired breed of dog of European origin, having tufts of hair on the muzzle
- affirmatively — affirming or assenting; asserting the truth, validity, or fact of something.
- afforestation — Afforestation is the process of planting large numbers of trees on land which has few or no trees on it.
- affreightment — a contract hiring a ship to carry goods
- aformentioned — Misspelling of aforementioned.
- african grape — a watermelon.
- african plate — a major tectonic division of the earth's crust, comprising the African continent as well as adjacent ocean basins (the Canary, Cape Verde, Angola, Cape Agulhas, Somali, Madagascar, and Natal Basins), and bounded on the north by the Eurasian and Arabian Plates, on the east by mid-ocean ridges (the Southwest Indian, Mid-Indian, and Carlsberg Ridges), on the south by the Antarctic Plate, and on the west by the Mid-Atlantic Ridge.
- afro-american — African-American
- after a while — some time later
- age hardening — the hardening of metals by spontaneous structural changes over a period of time
- aggiornamento — the process of bringing up to date methods, ideas, etc
- agglomeration — An agglomeration of things is a lot of different things gathered together, often in no particular order or arrangement.
- agglomerative — gathered together into a cluster or mass.
- aggregational — resulting from aggregation
- aggregatively — in an aggregative manner
- agro-economic — of or relating to a nation's agricultural economy, the financial problems of farmers as a group, etc.: mounting pressures on the agro-economic system.
- agrobacterium — A soil bacterium, of the genus Agrobacterium, which can fix nitrogen, and causes the formation of crown galls in plants.
- agrochemicals — Plural form of agrochemical.
- agroecologist — One who studies agroecology.
- agroterrorism — the use of biological agents as weapons against agricultural and food-supply industries
- air ambulance — An air ambulance is a helicopter or plane that is used for taking people to hospital.
- air commodore — a senior officer of the Royal Air Force and certain other air forces, of equivalent rank to brigadier in the Army
- air core coil — having a nonmagnetic core, as one of fiber or plastic, encircled by a coil (air-core coil) or containing one or more such coils: air-core transformer.
- air discharge — Air discharge is a method for testing ESD-protection structures in which the ESD generator is discharged through an air gap between the generator and the device under test.
- air force one — the US Air Force plane used by the US president
- air freshener — An air freshener is a product people can buy which is meant to make rooms smell pleasant.
- air hardening — a process of hardening high-alloy steels by heating and cooling in a current of air
- 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.