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13-letter words containing ro

  • drongo shrike — any insectivorous songbird of the family Dicruridae, of the Old World tropics, having a glossy black plumage, a forked tail, and a stout bill
  • dronkverdriet — drunk and maudlin
  • drop a stitch — to allow a loop of wool to fall off a knitting needle accidentally while knitting
  • drop shipment — a shipment of goods made directly from the manufacturer to the retailer or consumer but billed through the wholesaler or distributor.
  • drop the ball — a spherical or approximately spherical body or shape; sphere: He rolled the piece of paper into a ball.
  • drop-dead fee — a fee paid to an organization lending money to a company that is hoping to use it to finance a takeover bid. The fee is only paid if the bid fails and interest charges are only incurred if the money is needed
  • dropped waist — the waistline of a dress, gown, or the like when it is placed at the hips rather than at the natural waist.
  • drownproofing — a survival technique, for swimmers or nonswimmers, in which the body is allowed to float vertically in the water, with the head submerged, the lungs filled with air, and the arms and legs relaxed, the head being raised to breathe every ten seconds or so.
  • dual controls — If a vehicle used by a driving instructor has dual controls, it has pedals on the passenger's side as well as on the driver's side to allow the driving instructor to brake should the learner try to move off when it is dangerous to do so
  • dyer's rocket — weld2 .
  • e-proposition — a universal negative proposition
  • east rockaway — a town in SE New York.
  • eavesdroppers — Plural form of eavesdropper.
  • eavesdropping — to listen secretly to a private conversation.
  • edmund andros — Sir Edmund, 1637–1714, British governor in the American colonies, 1686–89, 1692–98.
  • eleanor cross — any of the crosses erected at each place where the body of Eleanor of Castile (1246–90, Edward I's Spanish wife) rested between Nottingham (where she died) and London (where she is buried)
  • electroactive — (of living tissue) exhibiting electrical activity or responsive to electrical stimuli
  • electrocement — cement that is produced through the addition of lime to molten slag in an electric furnace
  • electrochemic — electrochemical
  • electrocuting — Present participle of electrocute.
  • electrocution — The accidental death or suicide by electric shock.
  • electrocyclic — (organic chemistry) Describing a molecular rearrangement in which a covalent single bond is formed between the ends of a fully conjugated system resulting in a cyclic compound with one fewer double bonds.
  • electrodermal — Of or relating to measurement of the electrical conductivity of the skin, especially as an indicator of someone’s emotional responses.
  • electroformed — Produced, or modified by electroforming.
  • electrographs — Plural form of electrograph.
  • electrologist — A person trained to remove unwanted hair on the body or face or small blemishes on the skin by a method that involves the application of heat using an electric current.
  • electrolyzing — Present participle of electrolyze.
  • electromagnet — A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
  • electromerism — a type of tautomerism in which the isomers (electromers) differ in the distribution of charge in their molecules
  • electrometers — Plural form of electrometer.
  • electromotive — Producing or tending to produce an electric current.
  • 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 lens — a system, such as an arrangement of electrodes or magnets, that produces a field for focusing a beam of electrons
  • 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.
  • electron volt — a unit of energy equal to that attained by an electron falling unimpeded through a potential difference of one volt; 1.602 × 10-19 joule
  • electrooptics — the technology that deals with the production, control, and detection of light by electrical devices
  • electrophiles — Plural form of electrophile.
  • electrophilic — (of a molecule or group) having a tendency to attract or acquire electrons.
  • electrophones — Plural form of electrophone.
  • electrophonic — Relating to electronic equipment to produce sound (this adjectival sense is not comparable).
  • electrophorus — A device for repeatedly generating static electricity by induction.
  • electroplated — Simple past tense and past participle of electroplate.
  • electroplates — Third-person singular simple present indicative form of electroplate.
  • electroscopes — Plural form of electroscope.
  • electrostatic — Of or relating to stationary electric charges or fields as opposed to electric currents.
  • electrostrong — (physics) describing the combination of the electromagnetic and strong nuclear forces.
  • electrothermy — the use of electrically produced heat for therapeutic purposes
  • electrotyping — The act or process of making electrotypes.
  • electrotypist — an electrotyper
  • electrovalent — (of bonding) resulting from electrostatic attraction between positive and negative ions; ionic.
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