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13-letter words containing b, u, t, l

  • dumdum-bullet — a hollow-nosed or soft-nosed bullet that expands on impact, inflicting a severe wound.
  • duplicability — The quality of being duplicable.
  • dzibilchaltun — a large, ancient Mayan ceremonial and commercial center near Mérida, Mexico, founded perhaps as early as 3000 b.c. and in continuous use until the 16th century.
  • electric blue — Something that is electric blue is very bright blue in colour.
  • 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.
  • enumerability — The condition of being enumerable.
  • equilibrating — Present participle of equilibrate.
  • equilibration — The formation, or maintenance, of an equilibrium.
  • equilibratory — Relating to the physical sense of balance, or equilibrium.
  • equilibristic — Of or pertaining to equilibristics.
  • equitableness — The state or quality of being equitable; equitability.
  • excludability — The ability to be excluded.
  • extrudability — the quality of being extrudable
  • faculty board — the governing body of a faculty
  • fantabulously — In a fantabulous manner; fantastically, wonderfully.
  • fatiguability — Alternative form of fatigability.
  • fault breccia — angular rock fragments produced by fracture and grinding during faulting and distributed within or adjacent to the fault plane.
  • filibustering — Present participle of filibuster.
  • filibusterism — (dated) Piracy, freebooting; the waging of unauthorised war.
  • filibusterous — resembling a filibuster or the actions of a filibuster
  • flatbed truck — a truck with a flat platform for its body
  • flight number — the identifying number of a scheduled flight
  • flutterboards — Plural form of flutterboard.
  • fontainebleau — a town in N France, SE of Paris: famous palace, long a favorite residence of French kings; extensive forest.
  • fooling about — the act of speaking or acting in a playful, teasing, or jesting manner
  • fulbright act — an act of Congress (1946) by which funds derived chiefly from the sale of U.S. surplus property abroad are made available to U.S. citizens for study, research, and teaching in foreign countries as well as to foreigners to engage in similar activities in the U.S.
  • full-bottomed — (of a wig) long at the back
  • funambulation — the act of walking on a tightrope; funambulism
  • funambulatory — relating to tightrope-walking
  • fusible metal — any of various alloys, as of bismuth, lead, and tin, that melt at temperatures as low as 160°F (70°C), making them useful in various safety devices.
  • geissler tube — a sealed glass tube with platinum connections at the ends, containing rarefied gas made luminous by an electrical discharge.
  • ground beetle — any of numerous nocturnal, terrestrial beetles of the family Carabidae that feed chiefly on other insects.
  • gubernatorial — of or relating to a state governor or the office of state governor.
  • halobacterium — Any of various extremophiles, of genus Halobacterium, found in water saturated or nearly saturated with salt.
  • harold burton — Harold Hitz [hits] /hɪts/ (Show IPA), 1888–1964, associate justice of the U.S. Supreme Court 1945–58.
  • heart trouble — cardiac condition
  • heavily built — with a big heavy body
  • honourability — A state or condition or being honourable.
  • hothouse lamb — a lamb born in the fall or early winter, usually reared indoors, specially fed, and marketed when from 9 to 16 weeks of age.
  • hubble effect — redshift
  • hubristically — in a presumptuous or arrogant manner
  • humboldt peak — a mountain in S Colorado, in the Sangre de Cristo range. 14,064 feet (4290 meters).
  • hummle bonnet — a cap formerly worn by Scottish soldiers
  • illustratable — Capable of being illustrated.
  • immutableness — The state of being immutable; unchangeableness.
  • imperturbable — incapable of being upset or agitated; not easily excited; calm: imperturbable composure.
  • imperturbably — incapable of being upset or agitated; not easily excited; calm: imperturbable composure.
  • imputrescible — not liable to decomposition or putrefaction; incorruptible: a tanning process to make skins imputrescible.
  • incombustible — not combustible; incapable of being burned; fireproof.
  • inconstruable — unable to be construed
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