12-letter words containing a, e, r, o
- adulterously — In a adulterous manner.
- adverb group — An adverb group or adverbial group is a group of words based on an adverb, such as 'very slowly' or 'fortunately for us'. An adverb group can also consist simply of an adverb.
- advertorials — Plural form of advertorial.
- aelurophilia — ailurophilia.
- aelurophobia — ailurophobia.
- aeolian harp — a stringed instrument that produces a musical sound when a current of air or wind passes over the strings
- aerification — an act of combining with air.
- aeroacoustic — Relating to aeroacoustics.
- aerodonetics — the study of soaring or gliding flight, esp the study of gliders
- aerodynamics — Aerodynamics is the study of the way in which objects move through the air.
- aeroelastics — the study of aeroelastic phenomena.
- aeroembolism — an embolism of air bubbles often caused by surgery, induced abortion, or decompression sickness
- aeromagnetic — of magnetism in the atmosphere
- aeromechanic — an aircraft mechanic
- aeromedicine — the medical treatment of disorders associated with air or space travel
- aeronautical — Aeronautical means involving or relating to the design and construction of aeroplanes.
- aeroneurosis — a functional disorder of aeroplane pilots characterized by anxiety and various psychosomatic disturbances, caused by insufficient oxygen at high altitudes and the emotional tension of flying
- aeroplankton — the tiny plants, animals, and bacteria living and floating in the air
- aerosiderite — a meteorite which is composed mainly of iron
- aerosol bomb — a metal receptacle, containing an inert gas under pressure, that sprays an insecticide, disinfectant, or the like when the gas is released by opening a valve.
- aethrioscope — an instrument which measures temperature changes caused by different conditions of the sky
- affine group — the group of all affine transformations of a finite-dimensional vector space.
- afforestable — having the capacity to be turned into forest
- aforestation — Alternative spelling of afforestation.
- aforethought — premeditated (esp in the phrase malice aforethought)
- afrikanerdom — (in South Africa) Afrikaner nationalism based on pride in the Afrikaans language and culture, conservative Calvinism, and a sense of heritage as pioneers
- afrocentrism — centered on Africa or on African-derived cultures, as those of Brazil, Cuba, and Haiti: Afrocentric art.
- after a sort — to some extent
- after-school — After-school activities are those that are organized for children in the afternoon or evening after they have finished school.
- afterthought — If you do or say something as an afterthought, you do or say it after something else as an addition, perhaps without careful thought.
- agaricaceous — belonging to the Agaricaceae, a family of fungi including mushrooms having blade-shaped gills on the underside of the cap.
- agent orange — a highly poisonous herbicide used as a spray for defoliation and crop destruction, esp by US forces during the Vietnam War
- agglomerated — gathered together into a cluster or mass.
- agglomerates — Third-person singular simple present indicative form of agglomerate.
- agglomerator — gathered together into a cluster or mass.
- aggregations — Plural form of aggregation.
- agranulocyte — a white blood cell without granules in its cytoplasm
- agrobusiness — the businesses collectively associated with the production, processing, and distribution of agricultural products.
- agrochemical — a chemical, such as a pesticide, used for agricultural purposes
- agroforester — a person who carries out agroforestry
- agroforestry — a method of farming integrating herbaceous and tree crops
- aide-memoire — An aide-memoire is something such as a list that you use to remind you of something.
- aileron roll — a roll consisting of one or more rotations, usually controlled by the use of ailerons.
- ailurophiles — Plural form of ailurophile.
- ailurophobes — Plural form of ailurophobe.
- air embolism — the presence in the tissues and blood of a gas, such as air or nitrogen bubbles, caused by an injection of air or, in the case of nitrogen, by an abrupt and substantial reduction in the ambient pressure
- air observer — observer (def 3).
- airpocalypse — (informal) The presence of dense smog in many parts of China.
- airport code — a three-letter abbreviation of the names of the world's major airports, used especially as an identifier for routing baggage.
- alcohol-free — (of beer or wine) containing only a trace of alcohol