16-letter words containing r, i, o
- bullock's oriole — a common oriole, Icterus galbula bullockii, of western North America: a subspecies of the northern oriole.
- burgundy trefoil — alfalfa.
- burkitt lymphoma — a rare type of tumour of the white blood cells, occurring mainly in Africa and associated with infection by Epstein-Barr virus
- burning question — urgent matter for discussion
- burnt-tip orchid — a small orchid, Orchis ustulata, resembling the lady orchid, having dark reddish-brown hoods that give a burnt look to the tip of the flower spike
- burrowing blenny — graveldiver.
- butterfly orchid — an orchid (Oncidium papilio) with reddish flowers, native to South America
- buying behaviour — the behaviours displayed by consumers when they purchase things, such as preferences, price points, etc
- bypass capacitor — a capacitor which provides a low-impedance path for alternating current while not passing any direct current
- bypass operation — an operation involving redirection of blood flow, either to avoid a diseased blood vessel or in order to perform heart surgery
- calcium chloride — a white deliquescent salt occurring naturally in seawater and used in the de-icing of roads and as a drying agent. Formula: CaCl2
- calcium fluoride — a white, crystalline compound, CaF 2 , insoluble in water, occurring in nature as the mineral fluorite: used as a flux in metallurgy and as a decay preventive in dentifrices.
- california poppy — a papaveraceous plant, Eschscholtzia californica, of the Pacific coast of North America, having yellow or orange flowers and finely divided bluish-green leaves
- california quail — a quail, Callipepla californica, of the western coast of the U.S., having grayish-brown plumage with black, white, and chestnut markings.
- calorimetrically — In a calorimetric manner.
- campagna di roma — low-lying plain in central Italy, around Rome: c. 800 sq mi (2,072 sq km)
- canadian soldier — the mayfly.
- cape cod lighter — a device for lighting a fire, as in a fireplace, consisting of a lump of nonflammable material on a metal rod, that is soaked in kerosene or the like and lighted with a match.
- capillary action — Also called capillary action, capillary attraction. Physics. a manifestation of surface tension by which the portion of the surface of a liquid coming in contact with a solid is elevated or depressed, depending on the adhesive or cohesive properties of the liquid.
- capillary-action — Also called capillary action, capillary attraction. Physics. a manifestation of surface tension by which the portion of the surface of a liquid coming in contact with a solid is elevated or depressed, depending on the adhesive or cohesive properties of the liquid.
- capitation grant — a grant of money given to every person who qualifies under certain conditions
- carbon 14 dating — radiocarbon dating.
- carbon bisulfide — carbon disulfide
- carbon disulfide — a heavy, volatile, colorless liquid, CS2, highly flammable and poisonous, used as a solvent, insecticide, etc.
- carbon footprint — Your carbon footprint is a measure of the amount of carbon dioxide released into the atmosphere by your activities over a particular period.
- carbon-14 dating — radiocarbon dating.
- carboxypeptidase — any of several digestive enzymes that catalyze the removal of an amino acid from the end of a peptide chain having a free carbonyl group.
- cardiac neurosis — an anxiety reaction characterized by quick fatigue, shortness of breath, rapid heartbeat, dizziness, and other cardiac symptoms, but not caused by disease of the heart.
- cardiotachometer — a device for counting heartbeats, usually displaying the number of beats per minute
- carnot principle — the principle that no heat engine can be more efficient than one operating on a Carnot cycle of reversible changes
- caroline islands — an archipelago of over 500 islands and islets in the W Pacific Ocean east of the Philippines, all of which are now part of the Federated States of Micronesia, except for the Palau group: formerly part of the US Trust Territory of the Pacific Islands; centre of a typhoon zone. Area: (land) 1183 sq km (457 sq miles)
- carolus linnaeus — Carolus [kar-uh-luh s] /ˈkær ə ləs/ (Show IPA), (Carl von Linné) 1707–78, Swedish botanist.
- carpatho-ukraine — a region in W Ukraine: ceded by Czechoslovakia in 1945.
- carpenter gothic — (sometimes initial capital letters) a style of Victorian Gothic architecture adapted to the resources of contemporary woodworking tools and machinery.
- carrot and stick — If an organization has a carrot and stick approach or policy, they offer people things in order to persuade them to do something and punish them if they refuse to do it.
- carry conviction — to be convincing
- cartographically — the production of maps, including construction of projections, design, compilation, drafting, and reproduction.
- cash on delivery — If you pay for goods cash on delivery, you pay for them in cash when they are delivered. The abbreviation C.O.D. is also used.
- cash transaction — a piece of business, for example an act of buying or selling something
- casting director — the person in charge of choosing of actors for a production
- castor-oil plant — a tall euphorbiaceous Indian plant, Ricinus communis, cultivated in tropical regions for ornament and for its poisonous seeds, from which castor oil is extracted
- cataractogenesis — The formation of a cataract.
- catastrophically — of the nature of a catastrophe, or disastrous event; calamitous: a catastrophic failure of the dam.
- category listing — A category listing is a list of different product categories such as menswear, womenswear, and childrenswear.
- category mistake — a sentence that says of something in one category what can only intelligibly be said of something in another, as when speaking of the mind located in space
- catering college — a further education college where you learn to cook as a profession
- catherine howard — Catherine, c1520–42, fifth wife of Henry VIII.
- cavity resonator — a conducting surface enclosing a space in which an oscillating electromagnetic field can be maintained, the dimensions of the cavity determining the resonant frequency of the oscillations. It is used in microwave devices for frequencies exceeding 300 megahertz
- cedar revolution — the popular protests in 2005 that brought down the Lebanese cabinet and prompted Syria to withdraw its troops from Lebanon
- cerebellopontine — (anatomy) Relating to the cerebellum and pons.