12-letter words containing a, c, r, d, i
- quadraplegic — quadriplegic.
- quadriphonic — quadraphonic.
- quadriplegic — a person with quadriplegia.
- quadrisected — Simple past tense and past participle of quadrisect.
- quadrisonics — quadraphony.
- quadrophonic — Alternative spelling of quadraphonic.
- quinacridone — Any of a group of synthetic organic compounds whose molecules contain three benzene and two pyridine rings arranged alternately. They include a number of red to violet pigments.
- race suicide — the extinction of a racial or ethnic population that tends to result when, through the unwillingness or forbearance of its members to have children, the birthrate falls below the death rate.
- racemic acid — an isomeric modification of tartaric acid that is sometimes found in the juice of grapes in conjunction with the common dextrorotatory form and is optically inactive but can be separated into the two usual isomeric forms, dextrorotatory and levorotatory.
- radar picket — a ship, vehicle, or aircraft stationed at a distance from a protected force to increase radar detection range.
- radiator cap — a cap in the opening of a device for cooling an internal-combustion engine, through which coolant liquid can be added
- radical axis — the line such that tangents drawn from any point of the line to two given circles are equal in length.
- radical chic — the patronage of extremists or left-wing radicals by rich or famous people, as through invitations to social functions or public expressions of support.
- radical left — the faction representing extreme left-wing political views, often Marxist or Maoist in ideology.
- radical sign — the symbol √ or indicating extraction of a root of the quantity that follows it, as √25=5 or .
- radicicolous — living on the roots of plants
- radicivorous — feeding on the roots of plants
- radiesthetic — of or relating to radiesthesia
- radio beacon — a radio station that sends a characteristic signal so as to enable ships or airplanes to determine their position or bearing by means of a radio compass.
- radio source — a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves.
- radio-carbon — Also called carbon 14. a radioactive isotope of carbon with mass number 14 and a half-life of about 5730 years: widely used in the dating of organic materials.
- radio-collar — to attach a radio collar to (an animal).
- radioecology — the branch of ecology concerned with the effects of radioactivity on the environment
- radiolocator — radar.
- radiological — of or relating to radiology.
- radiolucency — almost entirely transparent to radiation; almost entirely invisible in x-ray photographs and under fluoroscopy.
- radiomimetic — (of drugs) producing effects similar to those produced by X-rays
- radionuclide — a radioactive nuclide.
- railroad car — a railway carriage or van
- raised beach — a wave-cut platform raised above the shoreline by a relative fall in the water level
- ravioli code — (jargon, humour) Object-oriented code consisting of a number of small and loosely-coupled software components. Presumably, the term is a compliment, contrasting the code with spaghetti code.
- re-educative — of or relating to re-education
- reaccredited — to ascribe or attribute to (usually followed by with): He was accredited with having said it.
- reacquainted — to make more or less familiar, aware, or conversant (usually followed by with): to acquaint the mayor with our plan.
- readjudicate — to pronounce or decree by judicial sentence.
- readmittance — the act or process of admitting someone or something again
- recalibrated — to determine, check, or rectify the graduation of (any instrument giving quantitative measurements).
- reciprocated — to give, feel, etc., in return.
- recirculated — to move in a circle or circuit; move or pass through a circuit back to the starting point: Blood circulates throughout the body.
- reclassified — to classify anew.
- redecoration — something used for decorating; adornment; embellishment: The gymnasium was adorned with posters and crepe-paper decorations for the dance.
- rededication — the act of dedicating.
- res judicata — a thing adjudicated; a case that has been decided.
- resyndicated — a group of individuals or organizations combined or making a joint effort to undertake some specific duty or carry out specific transactions or negotiations: The local furniture store is individually owned, but is part of a buying syndicate.
- revictualled — victuals, food supplies; provisions.
- reward claim — a claim granted to a miner who discovered gold in a new area
- richard korf — (person) A Professor of computer science at the University of California, Los Angeles. Richard Korf received his B.S. from MIT in 1977, and his M.S. and Ph.D. in computer science from Carnegie-Mellon University in 1980 and 1983. From 1983 to 1985 he served as Herbert M. Singer Assistant Professor of Computer Science at Columbia University. Dr. Korf studies problem-solving, heuristic search and planning in artificial intelligence. He wrote "Learning to Solve Problems by Searching for Macro-Operators" (Pitman, 1985). He serves on the editorial boards of Artificial Intelligence, and the Journal of Applied Intelligence. Dr. Korf is the recipient of several awards and is a Fellow of the American Association for Artificial Intelligence.
- rideau canal — a waterway in SE Ontario, Canada, connecting the Ottawa Riverin Ottawa to Lake Ontario in Kingston. 125 miles (202 km) long.
- road pricing — Road pricing is a system of making drivers pay money for driving on certain roads by electronically recording the movement of vehicles on those roads.
- road traffic — traffic on the road