17-letter words containing o, r, c, a, s
- 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 close quarters — If you do something at close quarters, you do it very near to a particular person or thing.
- at cross purposes — an opposing or contrary purpose.
- at cross-purposes — If people are at cross-purposes, they do not understand each other because they are working towards or talking about different things without realizing it.
- 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
- avogadro constant — the number of atoms or molecules in a mole of a substance
- bachelor's button — any of several plants of a genus (Centaurea) of the composite family, that have scaly, vase-shaped bracts below the white, pink, or blue flowers; esp., the cornflower and knapweed
- bachelor's degree — A bachelor's degree is a first degree awarded by universities.
- bachelor's-button — any of various plants with round flower heads, especially the cornflower.
- 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.
- bacteriorhodopsin — a purple protein containing retinal and found in the plasma membrane of certain bacteria (genus Halobacterium): it directly supplies electrochemical energy from sunlight
- barchester towers — a novel (1857) by Anthony Trollope.
- basic proposition — protocol (def 6).
- beyond comparison — outstanding, without equal
- black forest cake — a torte consisting typically of thin layers of chocolate cake spread with alternating layers of chocolate, cherry, and whipped-cream filling and covered with whipped cream
- black swallowwort — celandine (def 1).
- blackout curtains — thick, lined curtains designed to shut out all daylight and keep a room in complete darkness
- bluegrass country — region in central Ky. where there is much bluegrass
- boatswain's chair — a seat consisting of a short flat board slung from ropes, used to support a person working on the side of a vessel or in its rigging
- branch delay slot — delayed control-transfer
- breach of promise — (formerly) failure to carry out one's promise to marry
- breakdown service — a service that provides assistance to motorists who break down
- bricks and mortar — You can use bricks and mortar to refer to houses and other buildings, especially when they are considered as an investment.
- british cameroons — a former British trust territory of West Africa
- british columbian — of or relating to British Columbia or its inhabitants
- british-cameroons — German Kamerun. a region in W Africa: a German protectorate 1884–1919; divided in 1919 into British and French mandates.
- brocot escapement — a type of anchor escapement.
- buncher resonator — See under Klystron.
- bureau of customs — former name of the United States Customs Service.
- caesarean section — A Caesarean or a Caesarean section is an operation in which a baby is lifted out of a woman's womb through an opening cut in her abdomen.
- call-and-response — a form of interaction between a speaker and one or more listeners, in which every utterance of the speaker elicits a verbal or non-verbal response from the listener or listeners
- calorie-conscious — aware of the calorie content of one's diet
- canine parvovirus — a highly contagious viral disease of dogs characterized by vomiting, haemorrhagic diarrhoea, depression, and, in severe cases, death
- cape barren goose — a greyish Australian goose, Cereopsis novaehollandiae, having a black bill with a greenish cere
- carbon disulphide — a colourless slightly soluble volatile flammable poisonous liquid commonly having a disagreeable odour due to the presence of impurities: used as an organic solvent and in the manufacture of rayon and carbon tetrachloride. Formula: CS2
- carbon offsetting — a program in which a company, country, etc., reduces or offsets its carbon emissions through the funding of activities and projects that improve the environment: Carbon offsetting does not always have a quantifiable impact on the planet.
- carbonic-acid gas — carbon dioxide
- cardiac glycoside — any of a group of drugs used to stimulate the heart in cases of heart failure, obtained from a number of plants, as the foxglove, squill, or yellow oleander.
- cardinal grosbeak — any of various mostly tropical American buntings, such as the cardinal and pyrrhuloxia, the males of which have brightly coloured plumage
- cardio striptease — a form of keep-fit exercise in which people move their bodies in the manner of striptease artists
- cardiogenic shock — a type of shock caused by decreased cardiac output despite adequate blood volume, owing to a disease of the heart itself, as myocardial infarction, or any other factor that interferes with the filling or emptying of the heart.
- cardiorespiratory — of, relating to, or affecting the heart and respiratory system.