15-letter words containing op
- beet leafhopper — a small leafhopper (Circulifer tenellus) that transmits a very destructive virus to sugar beets
- biopsychologist — a field of psychology that deals with the effects of biological factors on behavior.
- bishop auckland — a town in N England, in central Durham: seat of the bishops of Durham since the 12th century: light industries. Pop: 24 764 (2001)
- black operation — a covert and undocumented military operation
- boustrophedonic — of or relating to lines written in opposite directions
- buy-back option — the option for a company to buy some or all of its shares from an investor, who acquired them by putting venture capital into the company when it was formed
- camera operator — a person who operates a film or television camera
- cardiopulmonary — of, relating to, or affecting the heart and lungs
- catastrophising — Present participle of catastrophise.
- catastrophizing — Present participle of catastrophize.
- celandine poppy — a poppy, Stylophorum diphyllum, of the east-central U.S., having one pair of deeply lobed leaves and yellow flowers.
- channel hopping — (chat) To rapidly switch channels on IRC, or a GEnie chat board. This term may derive from the TV idiom, "channel surfing".
- channel-hopping — Channel-hopping means switching quickly between different television channels because you are looking for something interesting to watch.
- chartophylacium — (in a medieval church) a place for the keeping of records and documents.
- chemoautotrophs — Plural form of chemoautotroph.
- chemoautotrophy — the process of deriving energy through oxidizing inorganic chemical compounds, as opposed to photosynthesis
- chemolithotroph — Chemoautotroph.
- chemoprevention — the prevention of disease, esp cancer, by means of chemical agents
- chemopsychiatry — the study and application of chemical substances in psychiatry
- chenopodiaceous — belonging to the Chenopodiaceae, formerly the goosefoot family, now considered part of the amaranth family of plants.
- chenopodium oil — a colorless or yellowish oil obtained from the seeds and leaves of Mexican tea, used chiefly in medicine as an agent for killing or expelling intestinal worms.
- chiropterophily — Pollination by bats.
- chop and change — When people chop and change, they keep changing their minds about what to do or how to act.
- chopped almonds — almonds cut into small pieces
- claustrophobics — Plural form of claustrophobic.
- cleptoparasites — Plural form of cleptoparasite.
- clouded leopard — a feline, Neofelis nebulosa, of SE Asia and Indonesia with a yellowish-brown coat marked with darker spots and blotches
- colposcopically — by means of a colposcope or colposcopy
- come out on top — If a person, organization, or country comes out on top, they are more successful than the others that they have been competing with.
- common property — property belonging to all members of a community.
- comparison-shop — to compare prices and quality of competing merchandise.
- congress-people — congressmember.
- contrapropeller — one of two propellers, usually attached to a ship or aircraft, which rotates in the opposite direction to the other
- cooperativeness — working or acting together willingly for a common purpose or benefit.
- copenhagen blue — a greyish-blue colour
- copper arsenite — a yellowish-green, water-insoluble, poisonous powder, CuHAsO 3 , used chiefly as a pigment and as an insecticide.
- copper sulphate — a copper salt found naturally as chalcanthite and made by the action of sulphuric acid on copper oxide. It usually exists as blue crystals of the pentahydrate that form a white anhydrous powder when heated: used as a mordant, in electroplating, and in plant sprays. Formula: CuSO4
- copper-bottomed — If you describe something as copper-bottomed, you believe that it is certain to be successful.
- copper-coloured — of a reddish-brown colour
- copy protection — a routine that is included in a program by its publisher to prevent the software from being duplicated except for a single backup copy.
- copying machine — a machine that makes copies of original documents, especially by xerography.
- copyright block — a block of four or more U.S. stamps that includes, in the selvage of the sheet, the copyright mark of the U.S. Postal Service.
- cosmopolitanism — free from local, provincial, or national ideas, prejudices, or attachments; at home all over the world.
- cosmopolitanize — to make cosmopolitan.
- coude telescope — a telescope in which light from the primary mirror is reflected along the polar axis to additional mirrors, and in which the focus (coudé focus) is independent of the telescope's motion, permitting the use of heavy instruments without disturbing the delicate balance of the telescope.
- counterproposal — a proposal offered as an alternative to a previous proposal
- cricopharyngeal — of, relating to, or involving the cricoid cartilage and the pharynx.
- cricopharyngeus — (anatomy) Part of the inferior pharyngeal constrictor, arising from the cricoid cartilage.
- crossopterygian — any bony fish of the subclass Crossopterygii, having fleshy limblike pectoral fins. The group, now mostly extinct, contains the ancestors of the amphibians
- cryoprecipitate — a precipitate obtained by controlled thawing of a previously frozen substance. Factor VIII, for treating haemophilia, is often obtained as a cryoprecipitate from frozen blood