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13-letter words containing b, r, n

  • edward gibbon — Edward, 1737–94, English historian.
  • elasmobranchs — Plural form of elasmobranch.
  • electron beam — a beam or stream of electrons emitted by a single source that move in the same direction and at the same speed
  • electron tube — (electronics)   (Or tube, vacuum tube, UK: valve, electron valve, thermionic valve, firebottle, glassfet) An electronic component consisting of a space exhausted of gas to such an extent that electrons may move about freely, and two or more electrodes with external connections. Nearly all tubes are of the thermionic type where one electrode, called the cathode, is heated, and electrons are emitted from its surface with a small energy (typically a Volt or less). A second electrode, called the anode (plate) will attract the electrons when it is positive with respect to the cathode, allowing current in one direction but not the other. In types which are used for amplification of signals, additional electrodes, called grids, beam-forming electrodes, focussing electrodes and so on according to their purpose, are introduced between cathode and plate and modify the flow of electrons by electrostatic attraction or (usually) repulsion. A voltage change on a grid can control a substantially greater change in that between cathode and anode. Unlike semiconductors, except perhaps for FETs, the movement of electrons is simply a function of electrostatic field within the active region of the tube, and as a consequence of the very low mass of the electron, the currents can be changed quickly. Moreover, there is no limit to the current density in the space, and the electrodes which do dissapate power are usually metal and can be cooled with forced air, water, or other refrigerants. Today these features cause tubes to be the active device of choice when the signals to be amplified are a power levels of more than about 500 watts. The first electronic digital computers used hundreds of vacuum tubes as their active components which, given the reliability of these devices, meant the computers needed frequent repairs to keep them operating. The chief causes of unreliability are the heater used to heat the cathode and the connector into which the tube was plugged. Vacuum tube manufacturers in the US are nearly a thing of the past, with the exception of the special purpose types used in broadcast and image sensing and displays. Eimac, GE, RCA, and the like would probably refer to specific types such as "Beam Power Tetrode" and the like, and rarely use the generic terms. The cathode ray tube is a special purpose type based on these principles which is used for the visual display in television and computers. X-ray tubes are diodes (two element tubes) used at high voltage; a tungsten anode emits the energetic photons when the energetic electrons hit it. Magnetrons use magnetic fields to constrain the electrons; they provide very simple, high power, ultra-high frequency signals for radar, microwave ovens, and the like. Klystrons amplify signals at high power and microwave frequencies.
  • elephantbirds — Plural form of elephantbird.
  • elgin marbles — a group of 5th-century bc Greek sculptures originally decorating the Parthenon in Athens, brought to England by Thomas Bruce, seventh Earl of Elgin (1766–1841), and now at the British Museum
  • embarrassment — A feeling of self-consciousness, shame, or awkwardness.
  • embracingness — the quality of something that embraces
  • embranchments — Plural form of embranchment.
  • embranglement — Embroilment, entanglement; the state of being or getting embrangled.
  • embrittlement — The characteristic or process of being embrittled.
  • embryogenetic — embryogenic
  • embryonically — In an embryonic way.
  • emtricitabine — A nucleoside reverse transcriptase inhibitor for the treatment of HIV infection.
  • encourageable — Able to be encouraged; suggestible.
  • encumbrancers — Plural form of encumbrancer.
  • endobronchial — (anatomy) Pertaining to the lining of the bronchi.
  • endurableness — (rare) The state of being endurable; endurability.
  • enrolled bill — draft legislation approved in identical form by both houses and sent to the President for approval
  • ensign-bearer — a soldier whose responsibility was to carry a Company's ensign
  • enumerability — The condition of being enumerable.
  • equilibrating — Present participle of equilibrate.
  • equilibration — The formation, or maintenance, of an equilibrium.
  • erin go bragh — Ireland forever
  • exacerbations — Plural form of exacerbation.
  • exhibitioners — Plural form of exhibitioner.
  • fabric ribbon — a typewriter ribbon made of inked material
  • fast-breaking — (of a news story) occurring suddenly, and often portending a series of events or further developments in rapid succession.
  • favorableness — Alternative spelling of favourableness.
  • featherbrains — Plural form of featherbrain.
  • febrifacients — Plural form of febrifacient.
  • fender bender — a collision between motor vehicles in which there is only minor damage.
  • fender-bender — a collision between motor vehicles in which there is only minor damage.
  • fibre channel — (storage, networking, communications)   An ANSI standard originally intended for high-speed SANs connecting servers, disc arrays, and backup devices, also later adapted to form the physical layer of Gigabit Ethernet. Development work on Fibre channel started in 1988 and it was approved by the ANSI standards committee in 1994, running at 100Mb/s. More recent innovations have seen the speed of Fibre Channel SANs increase to 10Gb/s. Several topologies are possible with Fibre Channel, the most popular being a number of devices attached to one (or two, for redundancy) central Fibre Channel switches, creating a reliable infrastructure that allows servers to share storage arrays or tape libraries. One common use of Fibre Channel SANs is for high availability databaseq clusters where two servers are connected to one highly reliable RAID array. Should one server fail, the other server can mount the array itself and continue operations with minimal downtime and loss of data. Other advanced features include the ability to have servers and hard drives seperated by hundreds of miles or to rapidly mirror data between servers and hard drives, perhaps in seperate geographic locations.
  • filibustering — Present participle of filibuster.
  • finger buffet — a buffet meal at which food that may be picked up with the fingers (finger food), such as canapés or vol-au-vents, is served
  • fingerbreadth — the breadth of a finger: approximately 3/4 inch (2 cm).
  • first baseman — the player whose position is first base.
  • fishbone fern — a common Australian fern, Nephrolepsis cordifolia, having fronds with many pinnae
  • flabergasting — Present participle of flabergast.
  • flight number — the identifying number of a scheduled flight
  • floating ribs — the eleventh and twelfth pairs of ribs, not attached to the breastbone or to other ribs but only to the vertebrae
  • flooring brad — a brad having a very small head, made in lengths from 2 to 4 inches (5 to 10 cm).
  • fluorocarbons — Plural form of fluorocarbon.
  • flying boxcar — a large airplane designed to carry cargo.
  • flying bridge — Also called flybridge, fly bridge, monkey bridge. Nautical. a small, often open deck or platform above the pilothouse or main cabin, having duplicate controls and navigational equipment.
  • foerstner bit — a bit for drilling blind holes, guided from the rim rather than from the center to permit it to enter the wood at an oblique angle.
  • forbiddenness — a past participle of forbid.
  • fort dearborn — a former U.S. fort on the site of Chicago, 1803–37.
  • forthbringing — Present participle of forthbring.
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