13-letter words starting with a
- age hardening — the hardening of metals by spontaneous structural changes over a period of time
- age of reason — a period of European history in the 18th cent. noted for belief in the ability of reason to discover truth, shape society, etc.
- agent-general — a representative in London of a Canadian province or an Australian state
- 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.
- agglutinating — Present participle of agglutinate.
- agglutination — the act or process of agglutinating
- agglutinative — tending to join or capable of joining
- agglutinogens — Plural form of agglutinogen.
- aggradational — (geology) Pertaining to or formed by aggradation.
- aggravatingly — in a manner that is aggravating
- aggregateness — the state of being aggregate
- aggregational — resulting from aggregation
- aggregatively — in an aggregative manner
- agonistically — in an agonistic manner
- agreeableness — to one's liking; pleasing: agreeable manners; an agreeable sensation.
- agriculturist — an agricultural expert
- 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.
- agro-industry — the large-scale production, processing, and packaging of food using modern equipment and methods.
- agrobacterium — A soil bacterium, of the genus Agrobacterium, which can fix nitrogen, and causes the formation of crown galls in plants.
- agrobiologist — One who studies bacteria and other organisms in soil for the purpose of growing crops or feeding animals.
- agrochemicals — Plural form of agrochemical.
- agroecologist — One who studies agroecology.
- agronomically — in an agronomic manner
- agrostography — a treatise on grasses.
- agrostologist — a person who specializes in agrostology
- agroterrorism — the use of biological agents as weapons against agricultural and food-supply industries
- ahead of time — If you do something ahead of time, you do it before a particular event or before you need to, in order to be well prepared.
- ahistorically — In an ahistorical way.
- ailurophiliac — Appropriate or pleasing to ailurophiles.
- 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.
- air pollution — contamination of the atmosphere
- air-breathing — (of an engine, aircraft, missile, etc.) to take in air from the atmosphere to oxidize the fuel for combustion.
- air-condition — to apply air conditioning to
- air-hardening — noting any metal, especially alloy steel, that can be hardened from above its transformation point by cooling in air.
- air-lift pump — a pump that pumps liquid by injecting air into the lower end of an open pipe immersed in the liquid: often used in boreholes
- air-to-ground — operating between an aircraft in flight and a target on the ground
- aircraftwoman — The female equivalent of an aircraftman.
- aircraftwomen — Plural form of aircraftwoman.
- airheadedness — The quality of being airheaded.
- airline pilot — a person who flies planes as a profession and works for a commercial airline
- airmail paper — the very thin blue paper used to write letters that are to be sent by airmail