17-letter words containing i, a, c, o
- aristolochiaceous — belonging to the Aristolochiaceae, the birthwort family of plants.
- armature reaction — a change in the magnetic field of a dynamo caused by the magnetic field induced by the current flowing through the armature.
- armchair shopping — buying goods using a computer, telephone, or television in the home or via the postal system
- aromatic compound — an organic compound that contains one or more benzene or equivalent heterocyclic rings: many such compounds have an agreeable odor.
- arresting officer — the police officer making an arrest
- arsenic poisoning — poisoning by arsenic
- articulated joint — Anatomy. a flexible joint.
- articulated lorry — a lorry made in two separate sections, a tractor and a trailer, connected by a pivoted bar
- articulatory loop — a short-term memory system that enables a person to remember short strings of words by rehearsing them repeatedly in his head
- artificial person — a human being, whether an adult or child: The table seats four persons.
- artistic director — a person in charge of the artistic direction of a theatre company
- as the crow flies — If you say that a place is a particular distance away as the crow flies, you mean that it is that distance away measured in a straight line.
- ascertained goods — specific goods
- assessable income — the portion of one's income that is subject to tax
- associate of arts — a degree granted especially by junior colleges after completion of two years of study. Abbreviation: A.A.
- associated states — Anguilla, Antigua, Dominica, Grenada, St Kitts-Nevis, St Lucia, and St Vincent and the Grenadines, which had the status of associated statehood
- association fiber — any of several nerve fibers connecting different areas of the cerebral cortex in the same hemisphere.
- associative array — (programming) (Or "hash", "map", "dictionary") An array where the indices are not just integers but may be arbitrary strings.
- astral projection — the departure of the astral body from the physical body, in order to travel to the astral plane
- astronomical unit — a unit of distance used in astronomy equal to the mean distance between the earth and the sun. 1 astronomical unit is equivalent to 1.495 × 1011 metres or about 9.3 × 107 miles
- astronomical year — year (def 4b).
- at the service of — To be at the service of a person or organization means to be available to help or be used by that person or organization.
- attorneys-in-fact — a person authorized by power of attorney to act on the authorizer's behalf outside a court of law.
- attraction sphere — centrosphere (sense 1)
- audio description — a facility provided for visually impaired people in which a film, television programme, or play is described through audio technology
- aurea mediocritas — the golden mean.
- australopithecine — any of various extinct apelike primates of the genus Australopithecus and related genera, remains of which have been discovered in southern and E Africa. Some species are estimated to be over 4.5 million years old
- authority control — the establishment and maintainance of consistent forms of terms, as of names, subjects, and titles, to be used as headings in bibliographic records.
- autocatalytically — In an autocatalytic manner.
- autocorrelational — Of or pertaining to autocorrelation.
- automatic vending — selling goods by vending machines
- automatic writing — writing performed without apparent intent or conscious control, especially to achieve spontaneity or uncensored expression.
- aviation medicine — the branch of medicine concerned with the effects on man of flight in the earth's atmosphere
- axis of abscissas — x-axis (def 1).
- axis-of-abscissas — x-axis (def 1).
- back on the rails — If something is back on the rails, it is beginning to be successful again after a period when it almost failed.
- bacon's rebellion — an unsuccessful uprising by frontiersmen in Virginia in 1676, led by Nathaniel Bacon against the colonial government in Jamestown.
- bacteriologically — In a bacteriological manner; with respect to bacteriology.
- bacteriorhodopsin — a purple protein containing retinal and found in the plasma membrane of certain bacteria (genus Halobacterium): it directly supplies electrochemical energy from sunlight
- bahia de cochinos — Spanish name of Bay of Pigs.
- baltimore clipper — a small, fast American sailing vessel of the early 19th century, having a sharp hull form and two masts with a pronounced rake and carrying a brig or schooner rig.
- basic proposition — protocol (def 6).
- beardmore glacier — one of the largest glaciers, in central Antarctica. About 125 miles (200 km) long.
- behind one's back — without one's knowledge; secretly or deceitfully
- benjamin-constant — Henri Benjamin [ahn-ree ban-zha-man] /ɑ̃ˈri bɛ̃ ʒaˈmɛ̃/ (Show IPA), (Benjamin Constant) 1767–1830, French statesman and author, born in Switzerland.
- betagalactosidase — any of a family of enzymes capable of liberating galactose from carbohydrates.
- beyond comparison — outstanding, without equal
- binet-simon scale — a test comprising questions and tasks, used to determine the mental age of subjects, usually children
- binocular rivalry — the phenomenon whereby one is unable to see simultaneously different images presented one to each eye; usually in some areas of the eye the image presented to the left eye is seen, in others that presented to the right eye
- biological father — the man whose semen fertilized the ovum from which a child was born