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16-letter words containing a, c, r, o

  • arthroscopically — By means of arthroscopy.
  • arthus' reaction — a severe, local immune reaction to the injection of an antigen in a sensitized host.
  • article of faith — If something is an article of faith for a person or group, they believe in it totally.
  • article of virtu — an object that it interesting because of its rarity, beauty or appeal to a connoisseur
  • artificial blood — a chemical emulsion, capable of carrying oxygen and carbon dioxide, for temporary use as a blood substitute in medical emergencies or when a patient objects to blood transfusions on religious grounds.
  • artificial crown — the enamel-covered part of a tooth above the gum
  • as distinct from — If you say that you are talking about one thing as distinct from another, you are indicating exactly which thing you mean.
  • ask for feedback — If you ask for feedback, you ask someone, such as a guest in a hotel, to tell you if they enjoyed their stay and what could be improved.
  • associate degree — An associate degree is a college degree that is awarded to a student who has completed a two-year course of study.
  • associate member — a person who is a member of a club, organization etc. but has only partial rights and privileges or subordinate status
  • association area — any of the regions of the cerebral cortex of the brain connected by numerous nerve fibers to all parts of both cerebral hemispheres and coordinating such higher activities as learning and reasoning.
  • aston dark space — the dark region between the cathode and the cathode glow in a vacuum tube, occurring when the pressure is low.
  • astroarchaeology — archaeoastronomy.
  • atherothrombotic — (medicine) Pertaining to or caused by atherothrombosis, the sudden disruption of an atherosclerotic plaque.
  • atlantic croaker — a person or thing that croaks.
  • atmospheric tide — a movement of atmospheric masses caused by the gravitational attraction of the sun and moon and by daily solar heating.
  • atomic structure — the concept of an atom as a central positively charged nucleus consisting of protons and neutrons surrounded by a number of electrons. The number of electrons is equal to the number of protons: the whole entity is thus electrically neutral
  • atrioventricular — of, relating to, or affecting both the atria and the ventricles of the heart
  • attendance order — (in Britain) an order issued by a court requiring a young offender to attend a specified place at specified times in order to carry out unpaid work, usually as an alternative to being fined
  • attorney-in-fact — a person authorized by power of attorney to act on the authorizer's behalf outside a court of law.
  • audio conference — a meeting that is conducted by the use of audio telecommunications
  • auditory vesicle — the pouch that is formed by the invagination of an ectodermal placode and that develops into the internal ear.
  • australopithecus — an extinct genus of small-brained,large-toothed bipedal hominids that lived in Africa between one and four million years ago.
  • autobiographical — An autobiographical piece of writing relates to events in the life of the person who has written it.
  • autoethnographic — Using ethnographic techniques to describe one's own life, or events in which one is a participant.
  • autofluorescence — (biology, microscopy) Self-induced fluorescence.
  • automatic camera — a camera in which the lens aperture or the shutter speed or both are automatically adjusted to the prevailing conditions
  • automatic redial — a telephone service feature whereby the last number dialed is automatically called again, either after a specified time or when activated by the user.
  • automatic repeat — a key on the keyboard of a typewriter, computer, etc, which, when depressed continuously, produces the character repeatedly until the key is released
  • automatrix, inc. — (company)   The company which produced CAM-PC. Address: Ballston Spa, NY, USA.
  • autoradiographic — Of or pertaining to an autoradiograph, a radiographic image produced by the decay of a radioactive substance.
  • autostereoscopic — Of or pertaining to autostereoscopy.
  • auxiliary police — a part-time reserve attached to a regular police force
  • azodicarbonamide — (chemistry) An organic chemical, a yellow to orange red, odorless, crystalline powder, used in food industry as a food additive, a flour bleaching agent and improving agent and in foaming plastics.
  • bachelor of arts — a degree conferred on a person who has successfully completed his or her undergraduate studies, usually in a branch of the liberal arts or humanities
  • bachelor-at-arms — bachelor (def 4).
  • back-propagation — (Or "backpropagation") A learning algorithm for modifying a feed-forward neural network which minimises a continuous "error function" or "objective function." Back-propagation is a "gradient descent" method of training in that it uses gradient information to modify the network weights to decrease the value of the error function on subsequent tests of the inputs. Other gradient-based methods from numerical analysis can be used to train networks more efficiently. Back-propagation makes use of a mathematical trick when the network is simulated on a digital computer, yielding in just two traversals of the network (once forward, and once back) both the difference between the desired and actual output, and the derivatives of this difference with respect to the connection weights.
  • background check — an investigation into a person's origins and previous history
  • background music — music of any kind that is played while some other activity is going on, so that people do not actively attend to it
  • background noise — any type of noise that is not the sound that you are specifically listening to or monitoring
  • background paper — a report or other piece of writing that is intended to provide contextual and historical information that will help people understand a particular topic or situation
  • backus-naur form — (language, grammar)   (BNF, originally "Backus Normal Form") A formal metasyntax used to express context-free grammars. Backus Normal Form was renamed Backus-Naur Form at the suggestion of Donald Knuth. BNF is one of the most commonly used metasyntactic notations for specifying the syntax of programming languages, command sets, and the like. It is widely used for language descriptions but seldom documented anywhere (how do you document a metasyntax?), so that it must usually be learned by osmosis (but see RFC 2234). Consider this BNF for a US postal address: ::= ::= | "." ::= [] | ::= [] ::= "," This translates into English as: "A postal-address consists of a name-part, followed by a street-address part, followed by a zip-code part. A personal-part consists of either a first name or an initial followed by a dot. A name-part consists of either: a personal-part followed by a last name followed by an optional "jr-part" (Jr., Sr., or dynastic number) and end-of-line, or a personal part followed by a name part (this rule illustrates the use of recursion in BNFs, covering the case of people who use multiple first and middle names and/or initials). A street address consists of an optional apartment specifier, followed by a street number, followed by a street name. A zip-part consists of a town-name, followed by a comma, followed by a state code, followed by a ZIP-code followed by an end-of-line." Note that many things (such as the format of a personal-part, apartment specifier, or ZIP-code) are left unspecified. These lexical details are presumed to be obvious from context or specified somewhere nearby. There are many variants and extensions of BNF, possibly containing some or all of the regexp wild cards such as "*" or "+". EBNF is a common one. In fact the example above isn't the pure form invented for the ALGOL 60 report. "[]" was introduced a few years later in IBM's PL/I definition but is now universally recognised. ABNF is another extension.
  • backward-looking — If you describe someone or something as backward-looking, you disapprove of their attitudes, ideas, or actions because they are based on old-fashioned opinions or methods.
  • bacterioplankton — (biology) The bacterial component of marine plankton.
  • badminton racket — the type of racket used in games of badminton
  • balance of power — The balance of power is the way in which power is distributed between rival groups or countries.
  • balance of trade — A country's balance of trade is the difference in value, over a period of time, between the goods it imports and the goods it exports.
  • balloon catheter — a type of catheter with a tiny, inflatable balloon at the tip, used in various surgical procedures
  • ballroom dancing — Ballroom dancing is a type of dancing in which a man and a woman dance together using fixed sequences of steps and movements.
  • baltimore canyon — a submarine valley cut into the continental shelf and slope seaward of Chesapeake Bay.
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