11-letter words containing a, c, o, i
- araliaceous — of, relating to, or belonging to the Araliaceae, a chiefly tropical family of trees, shrubs, or woody climbers having small clusters of whitish or greenish flowers. The family includes the ivy and ginseng
- archaeornis — an extinct primitive Jurassic bird, formerly placed in the genus Archaeornis but now thought to be a species of archaeopteryx
- archaeozoic — Archeozoic
- archbishops — Plural form of archbishop.
- archdiocese — An archdiocese is the area over which an archbishop has control.
- archegonial — relating to an archegonium
- archegonium — a female sex organ, occurring in mosses, spore-bearing vascular plants, and gymnosperms, that produces a single egg cell in its swollen base
- archeologic — (American spelling) alternative spelling of archaeologic.
- archicortex — (anatomy) Part of the allocortex, specifically three layered hippocampal cortexes necessary for hippocampus formation.
- archilochus — 7th century bc, Greek poet of Paros, notable for using his own experience as subject matter
- archipelago — An archipelago is a group of islands, especially small islands.
- architector — (obsolete) An architect.
- archtraitor — A chief or transcendent traitor.
- arctic zone — the section of the earth's surface lying between the Arctic Circle and the North Pole.
- arcticology — the scientific study of the Polar Regions.
- arctophilia — the practice of collecting teddy bears
- area office — a part of a business, organization, etc which is the most important office in a specific geographical area
- arenicolous — growing or living in sand or sandy places
- areocentric — relating to a reference system which has Mars as its centre
- areographic — relating to areography
- aristocracy — The aristocracy is a class of people in some countries who have a high social rank and special titles.
- aristocrats — Plural form of aristocrat.
- aromaticity — the property of certain planar cyclic conjugated molecules, esp benzene, of behaving like unsaturated molecules and undergoing substitution reactions rather than addition as a result of delocalization of electrons in the ring
- ars poetica — the art of poetry
- articulator — a person or thing that articulates
- artiodactyl — any placental mammal of the order Artiodactyla, having hooves with an even number of toes; an even-toed ungulate. The order includes pigs, hippopotamuses, camels, deer, cattle, and antelopes
- ascensional — (astronomy) Relating to ascension.
- asciibonics — (chat) (From ASCII and Ebonics) A style of text communication in English which is most common on talk systems such as irc. Its notable characteristics are: Typing all in lowercase (and occasionally all in uppercase). Copious use of abbreviations of the sort "u" for "you" "1" for "one" (and therefore "some1" for "someone", "ne1" for "anyone"), "2" for "to", "r" for "are", etc. A general lack of punctuation, except for strings of question marks and exclamation marks. Common use of the idiom "m or f?", meant to elicit a statement of the listener's gender. Typical extended discourse in ASCIIbonics: "hey wasup ne1 want 2 cyber?" "m or f?" ASCIIbonics is similar to the way B1FF talked, although B1FF used more punctuation (lots more), and used all uppercase, rather than all lowercase. What's more, B1FF was only interested in warez, and so never asked "m or f?". It has been widely observed that some of the purest examples of ASCIIbonics come from non-native speakers of English. The phenomenon of ASCIIbonics predates by several years the use of the word "ASCIIbonics", as the word could only have been coined in or after late 1996, when "Ebonics" was first used in the US media to denote the US English dialects known in the linguistic literature as "Black Vernacular English".
- ascititious — having been added to from something inessential or separate
- ascriptions — Plural form of ascription.
- associating — to connect or bring into relation, as thought, feeling, memory, etc.: Many people associate dark clouds with depression and gloom.
- association — An association is an official group of people who have the same job, aim, or interest.
- associative — Associative thoughts are things that you think of because you see, hear, or think of something that reminds you of those things or which you associate with those things.
- associators — Plural form of associator.
- astrometric — (astronomy) of or relating to astrometry.
- astronautic — Of or pertaining to astronautics.
- atherogenic — causing atheroma
- atmospheric — Atmospheric is used to describe something which relates to the Earth's atmosphere.
- atomic bomb — An atomic bomb or an atom bomb is a bomb that causes an explosion by a sudden release of energy that results from splitting atoms.
- atomic heat — the product of an element's atomic weight and its specific heat (capacity)
- atomic mass — the mass of an isotope of an element in atomic mass units
- atomic pile — nuclear reactor
- atomtronics — (physics) The design, manufacture and study of analogs of electronics using atoms (especially Bose-Einstein condensates) at low temperature.
- atrociously — extremely or shockingly wicked, cruel, or brutal: an atrocious crime.
- attic order — a low pilaster of any order set into the cornice of a building
- attophysics — the physics of structures and artefacts with dimensions in the attometre range or of devices, such as lasers, capable of producing pulses with a duration measured in attoseconds
- attractions — Plural form of attraction.
- auction off — If you auction off something, you sell it to the person who offers the most money for it, often at an auction.
- auctioneers — Plural form of auctioneer.
- audaciously — extremely bold or daring; recklessly brave; fearless: an audacious explorer.