12-letter words containing a, p, e, r
- appressorium — a flattened hypha of a parasitic fungus that penetrates the host tissues
- approachable — If you describe someone as approachable, you think that they are friendly and easy to talk to.
- approachment — (archaic) approach.
- appropriable — that can be appropriated
- appropriated — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- appropriates — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximated — near or approaching a certain state, condition, goal, or standard.
- approximates — near or approaching a certain state, condition, goal, or standard.
- appurtenance — a secondary or less significant thing or part
- arachnophobe — a person who is afraid of spiders
- araneomorphs — Plural form of araneomorph.
- arapaho peak — a mountain in N Colorado, in the Front Range of the Rocky Mountains W of Boulder. 13,506 feet (4119 meters).
- arc spectrum — a spectrum formed from the light produced by an electric arc, characteristic of the gas or vapor through which the arc passes.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archetypally — the original pattern or model from which all things of the same kind are copied or on which they are based; a model or first form; prototype.
- archetypical — Archetypical means the same as archetypal.
- archipelagic — a large group or chain of islands: the Malay Archipelago.
- archipelagos — Plural form of archipelago.
- archiphoneme — an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized: conventionally shown by a capital letter within slashes, as /T/ for /t/ and /d/ in German Rat and Rad
- arena chapel — a private chapel in Padua containing a fresco cycle painted (1305–06) by Giotto.
- aripiprazole — An antipsychotic drug used in the treatment of schizophrenia etc.
- aristophanes — ?448–?380 bc, Greek comic dramatist, who satirized leading contemporary figures such as Socrates and Euripides. Eleven of his plays are extant, including The Clouds, The Frogs, The Birds, and Lysistrata
- armor-plated — An armor-plated vehicle or building has a hard metal covering in order to protect it from gunfire and other missiles.
- armored rope — rope made of wire-wrapped hempen strands that is used in salvage work.
- armour plate — a tough heavy steel, usually containing chromium, nickel, and molybdenum and often hardened on the surface, used for protecting warships, tanks, etc
- aromatherapy — Aromatherapy is a type of treatment which involves massaging the body with special fragrant oils.
- arpeggiation — the writing, playing or singing of arpeggios
- arseno group — the bivalent group −As=As−.
- arsenopyrite — a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
- arsphenamine — a drug containing arsenic, formerly used in the treatment of syphilis and related infections
- arteriopathy — Any disease of the arteries.
- arthroscopes — Plural form of arthroscope.
- arthrospores — an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore.
- as per usual — as usual
- asking price — The asking price of something is the price which the person selling it says that they want for it, although they may accept less.
- asparaginase — an enzyme used in treating leukaemia
- aspect ratio — the ratio of width to height of the picture on a television or cinema screen
- aspiringness — the condition of being aspiring
- assessorship — the occupation, post or duties of a person who assesses, advises, or estimates
- astral plane — a plane of existence inhabited by astral bodies
- at a premium — If something is at a premium, it is wanted or needed, but is difficult to get or achieve.
- at any price — If you want something at any price, you are determined to get it, even if unpleasant things happen as a result.
- at the press — being printed
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- atomic power — nuclear power.
- attorneyship — The office or profession of an attorney.
- autoexposure — A device that sets the exposure automatically on a camera or other piece of equipment.