13-letter words containing b, e, c, l, o, t
- 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.
- exceptionable — Open to objection; causing disapproval or offense.
- float chamber — Automotive. the bowl-shaped section of a carburetor in which a reserve of fuel is maintained, the fuel level being regulated by a float.
- fort campbell — a military reservation in SW Kentucky and NW Tennessee, NW of Clarksville, Tenn., and SW of Hopkinsville, Ky.
- halobacterium — Any of various extremophiles, of genus Halobacterium, found in water saturated or nearly saturated with salt.
- hemimetabolic — (zoology) Having an incomplete metamorphosis, the larvae differing from the adults chiefly in lacking wings.
- hemocytoblast — a primordial cell capable of developing into any type of blood cell.
- heteroblastic — (of a plant or plant part) showing a marked difference in form between the juvenile and the adult structures
- holometabolic — Of, pertaining to, or undergoing holometabolism.
- hypometabolic — Relating to hypometabolism.
- incombustible — not combustible; incapable of being burned; fireproof.
- incompatibles — not compatible; unable to exist together in harmony: She asked for a divorce because they were utterly incompatible.
- inconstruable — unable to be construed
- incontestable — incapable of being contested; not open to dispute; incontrovertible: incontestable proof.
- incontestably — incapable of being contested; not open to dispute; incontrovertible: incontestable proof.
- incontestible — Alternative spelling of incontestable.
- inconvertible — (of paper money) not capable of being converted into specie.
- inconvertibly — In an inconvertible manner.
- incorruptable — Misspelling of incorruptible.
- incorruptible — not corruptible: incorruptible integrity.
- indolebutyric — as in indolebutyric acid, a synthetic plant growth regulator
- level5 object — From Information Builders.
- megaloblastic — an abnormally large, immature, and dysfunctional red blood cell found in the blood of persons with pernicious anemia or certain other disorders.
- mescal button — one of the dried, buttonlike tops of a mescal of the genus Lophophora, used as a hallucinogen, especially by certain Indians of Mexico and the southwestern U.S. during religious ceremonies; peyote.
- metabolically — of, relating to, or affected by metabolism.
- metallic bond — the type of chemical bond between atoms in a metallic element, formed by the valence electrons moving freely through the metal lattice.
- methocarbamol — a substance, C 1 1 H 1 5 NO 5 , used as a muscle relaxant in combination with other drugs in the treatment of acute, painful musculoskeletal conditions.
- mortise block — a block having a shell cut from a single piece of wood.
- motorbicycles — Plural form of motorbicycle.
- mycobacterial — (medicine) Of or pertaining to mycobacteria.
- myelofibrotic — of, relating to or affected by myelofibrosis
- news blackout — a situation in which a government or other authority imposes a ban on the publication of news on a particular subject
- non-excitable — easily excited: Prima donnas had the reputation of being excitable and temperamental.
- nonactionable — furnishing ground for a lawsuit.
- nonalphabetic — not employing alphabetic order
- noncompatible — Not compatible.
- nondeductible — Not allowable as a deduction from income for the calculation of taxes.
- nondetachable — Not capable of being detached.
- noticeability — The quality of being easy to see or notice.
- object clause — the clause that acts as the object of a verb
- object lesson — a practical or concrete illustration of a principle.
- object pascal — (language) An object-oriented Pascal developed jointly by Apple Computer and Niklaus Wirth.
- objectionable — causing or tending to cause an objection, disapproval, or protest.
- objectionably — causing or tending to cause an objection, disapproval, or protest.
- obsolescently — In an obsolescent manner.
- obstacle race — a foot race in which the contestants are prevented in a specific way from covering the full course at top speed, as by having hurdles to jump, sacks enclosing the legs, or potatoes to pick up.
- obstetrically — (medicine) In terms of obstetrics.
- obstructively — In an obstructive manner.
- octosyllables — Plural form of octosyllable.