21-letter words containing a, c, o
- christmas decorations — decorations of different kinds appropriate to Christmas, such as tinsel, candles, images of angels, etc.
- circle of declination — hour circle.
- circular polarization — electromagnetic radiation (esp light) in which the electric field vector describes a circle about the direction of propagation at any point in the path of the radiation
- civilian review board — a quasi-judicial board of appointed or elected citizens that investigates complaints against the police.
- class-relation method — (programming) A design technique based on the concepts of object-oriented programming and the Entity-Relationship model from the French company Softeam.
- clayton antitrust act — an act of Congress in 1914 supplementing the Sherman Antitrust Act and establishing the FTC.
- clayton-bulwer treaty — an agreement between the U.S. and Great Britain in 1850 guaranteeing that any canal built to connect the Atlantic and Pacific across Central America would be jointly controlled, open to all nations, and unfortified.
- clean someone's clock — an instrument for measuring and recording time, especially by mechanical means, usually with hands or changing numbers to indicate the hour and minute: not designed to be worn or carried about.
- clement of alexandria — Saint. original name Titus Flavius Clemens. ?150–?215 ad, Greek Christian theologian: head of the catechetical school at Alexandria; teacher of Origen. Feast day: Dec 5
- clinical psychologist — a practitioner of clinical psychology
- clone-and-hack coding — case and paste
- closed-angle glaucoma — angle-closure glaucoma. See under glaucoma.
- collective bargaining — When a trade union engages in collective bargaining, it has talks with an employer about its members' pay and working conditions.
- college of propaganda — information, ideas, or rumors deliberately spread widely to help or harm a person, group, movement, institution, nation, etc.
- collimator viewfinder — a type of viewfinder in a camera
- collins street farmer — a businessman who invests in farms, land, etc
- column address strobe — (hardware) (CAS) A signal sent from a processor (or memory controller) to a dynamic random-access memory (DRAM) (qv) circuit to indicate that the column address lines are valid.
- column chromatography — the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
- combination principle — Ritz combination principle.
- comfortably-furnished — containing comfortable furniture
- commercial fertilizer — fertilizer manufactured chemically, as distinguished from natural fertilizer, as manure.
- commercial television — television companies which make money by selling advertising
- commercial translator — (language) An English-like pre-COBOL language for business data processing.
- committal proceedings — a preliminary hearing in a magistrates' court to decide if there is a case to answer
- committing magistrate — a magistrate who decides if there is enough evidence for a case to proceed
- common carotid artery — the part of a carotid artery between its origin and its point of division into branches.
- communication science — the study of ways in which human beings communicate, including speech, gesture, telecommunication systems, publishing and broadcasting media, etc
- communications server — (operating system) IBM's rebranding of ACF.
- community association — (in Britain) an organization of people and groups working for the common good of a neighbourhood, usually operating under a written constitution registered with the Charity Commissioners
- companionate marriage — a proposed system of trial marriage in which the couple would postpone having children and could be divorced by mutual consent, until a final decision to stay married is reached
- comparative philology — comparative linguistics.
- comparative statement — a financial statement with figures arranged in two or more parallel columns, each column representing a fiscal year or other period, used to compare performance between periods.
- comparison microscope — a microscope having two objective lenses and using a system of prisms to form in one eyepiece adjacent images of two different objects.
- compensation neurosis — an unconscious attempt to retain physical or psychological symptoms of illness when some advantage may be obtained (distinguished from malingering).
- competitive advantage — an advantage based on success in competition
- complete metric space — (theory) A metric space in which every sequence that converges in itself has a limit. For example, the space of real numbers is complete by Dedekind's axiom, whereas the space of rational numbers is not - e.g. the sequence a[0]=1; a[n_+1]:=a[n]/2+1/a[n].
- completing the square — a method, usually of solving quadratic equations, by which a quadratic expression, as x 2 − 4 x + 3, is written as the sum or difference of a perfect square and a constant, x 2 − 4 x + 4 + 3 − 4 = (x − 2) 2 − 1, by addition and subtraction of appropriate constant terms.
- componential analysis — the analysis of a set of related linguistic items, especially word meanings, into combinations of features in terms of which each item may be compared with every other, as in the analysis of man into the semantic features “male,” “mature,” and “human,” woman into “female,” “mature,” and “human,” girl into “female,” “immature,” and “human,” and bull into “male,” “mature,” and “bovine.”.
- computer aided design — (application) (CAD) The part of CAE concerning the drawing or physical layout steps of engineering design. Often found in the phrase "CAD/CAM" for ".. manufacturing".
- computer architecture — the structure, behaviour, and design of computers
- computer-aided design — the use of computer techniques in designing products, esp involving the use of computer graphics
- compuware corporation — (company) A US software and service company established in 1973. Since 1973, Compuware focused on optimising business software development, testing and operation. In 1999 the company had grown to over 15,000 employees worldwide and revenues of more than $1.6B. By 2013 it had shrunk to less than 5000. Current (2013) products and services include performance optimisation, availability and quality of web, non-web, mobile, streaming and cloud applications; project portfolio management, professional services automation; mainframe applications and developer tools; rapid application development and professional services.
- concert grand (piano) — the largest size of grand piano, for concert performance
- conditional discharge — If someone who is convicted of an offence is given a conditional discharge by a court, they are not punished unless they later commit a further offence.
- conditional operation — a step in a computer program that determines which of two or more instructions or instruction sequences to execute next, depending on whether or not one or more specified conditions have been met.
- cone penetration test — a method of testing soils by pressing a cone of standard dimensions into the soil under a known load and measuring the penetration
- conference facilities — Conference facilities are large rooms and pieces of equipment that a hotel provides so an organization can have conference there.
- confidence and supply — denoting an arrangement in a hung parliament in which an opposition party agrees not to vote against a minority government in votes of confidence or budgetary matters but reserves the right to oppose other legislation
- confirm a reservation — If you confirm a reservation, you inform someone who has booked a room at a hotel that the reservation is definite.
- congregational church — any evangelical Protestant Christian Church that is governed according to the principles of Congregationalism. In 1972 the majority of churches in the Congregational Church in England and Wales voted to become part of the United Reformed Church