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18-letter words containing y, a, c

  • magic switch story — Some years ago, I was snooping around in the cabinets that housed the MIT AI Lab's PDP-10, and noticed a little switch glued to the frame of one cabinet. It was obviously a homebrew job, added by one of the lab's hardware hackers (no-one knows who). You don't touch an unknown switch on a computer without knowing what it does, because you might crash the computer. The switch was labelled in a most unhelpful way. It had two positions, and scrawled in pencil on the metal switch body were the words "magic" and "more magic". The switch was in the "more magic" position. I called another hacker over to look at it. He had never seen the switch before either. Closer examination revealed that the switch had only one wire running to it! The other end of the wire did disappear into the maze of wires inside the computer, but it's a basic fact of electricity that a switch can't do anything unless there are two wires connected to it. This switch had a wire connected on one side and no wire on its other side. It was clear that this switch was someone's idea of a silly joke. Convinced by our reasoning that the switch was inoperative, we flipped it. The computer instantly crashed. Imagine our utter astonishment. We wrote it off as coincidence, but nevertheless restored the switch to the "more magic" position before reviving the computer. A year later, I told this story to yet another hacker, David Moon as I recall. He clearly doubted my sanity, or suspected me of a supernatural belief in the power of this switch, or perhaps thought I was fooling him with a bogus saga. To prove it to him, I showed him the very switch, still glued to the cabinet frame with only one wire connected to it, still in the "more magic" position. We scrutinized the switch and its lone connection, and found that the other end of the wire, though connected to the computer wiring, was connected to a ground pin. That clearly made the switch doubly useless: not only was it electrically nonoperative, but it was connected to a place that couldn't affect anything anyway. So we flipped the switch. The computer promptly crashed. This time we ran for Richard Greenblatt, a long-time MIT hacker, who was close at hand. He had never noticed the switch before, either. He inspected it, concluded it was useless, got some diagonal cutters and diked it out. We then revived the computer and it has run fine ever since. We still don't know how the switch crashed the machine. There is a theory that some circuit near the ground pin was marginal, and flipping the switch changed the electrical capacitance enough to upset the circuit as millionth-of-a-second pulses went through it. But we'll never know for sure; all we can really say is that the switch was magic. I still have that switch in my basement. Maybe I'm silly, but I usually keep it set on "more magic".
  • magnetocrystalline — (physics) Describing the interaction between the magnetization and the crystal structure of a material.
  • magnetoelectricity — electricity developed by the action of magnets.
  • magnetogasdynamics — magnetohydrodynamics.
  • management company — a company that manages a unit trust
  • marine archaeology — the branch of archaeology that deals with the recovery of ancient objects found beneath the sea, as shipwrecks or remains from submerged islands, and with the techniques of underwater exploration, excavation, and retrieval.
  • may flower compact — an agreement to establish a government, entered into by the Pilgrims in the cabin of the Mayflower on November 11, 1620.
  • medical dictionary — a specialized dictionary covering terms used in the health professions by doctors, nurses, and others involved in allied health care services. A dictionary with authoritative spellings and definitions is a particularly crucial resource in medicine, where a misspelling or misunderstanding can have unfortunate consequences for people under care. Print dictionaries in this field may be sorted alphabetically or may be categorized according to medical specializations or by the various systems in the body, as the immune system and the respiratory system. The online Medical Dictionary on Dictionary.com allows alphabetical browsing in the combined electronic versions of more than one authoritative medical reference, insuring access to correct spellings, as well as immediate, direct access to a known search term typed into the search box on the site: A medical dictionary reveals that large numbers of medical terms are formed from the same Latin and Greek parts combined and recombined.
  • mercury delay line — (storage, history)   An archaic first-in first-out fixed time period data storage device using acoustic transducers to transmit data as waves in a trough or tube of mercury. EDSAC (Cambridge) and UNIVAC I used delay lines.
  • mercury-vapor lamp — a lamp producing a light with a high actinic and ultraviolet content by means of an electric arc in mercury vapor.
  • metabolic syndrome — Pathology. a group of medical conditions present simultaneously in a patient, as high blood pressure, low HDL cholesterol levels, and an excess of abdominal fat, that increases a person's risk of heart disease, stroke, and diabetes. Also called insulin resistance syndrome.
  • methacrylate resin — an acrylic resin formed by polymerizing the esters or amides of methacrylic acid.
  • methylcyclohexanol — a colorless, aromatic, viscous liquid mixture, chiefly of the ortho and para forms of CH 3 C 6 H 1 0 OH, derived from cresol by hydrogenation: used chiefly as a solvent for rubber, cellulose, esters, and phenols.
  • mexican gold poppy — an annual wildflower, Eschscholzia mexicana, having orange-gold, cup-shaped flowers, found in dry, mountainous regions of western North America.
  • microcrystallinity — The condition of being microcrystalline.
  • micropalaeontology — the branch of palaeontology concerned with the study of microscopic fossils
  • military policeman — A military policeman is a member of the military police.
  • mobility allowance — an allowance paid by the government to help people who have limited mobility
  • mountain cranberry — cowberry
  • mucopolysaccharide — (formerly) glycosaminoglycan.
  • multifunctionality — The condition of being multifunctional.
  • muscular dystrophy — a hereditary disease characterized by gradual wasting of the muscles with replacement by scar tissue and fat, sometimes also affecting the heart.
  • music to your ears — If something that you hear is music to your ears, it makes you feel very happy.
  • mutual aid society — A mutual aid society is an organization that provides benefits or other help to its members when they are affected by things such as death, sickness, disability, old age, or unemployment.
  • mutually exclusive — of or relating to a situation involving two or more events, possibilities, etc., in which the occurrence of one precludes the occurrence of the other: mutually exclusive plans of action.
  • mutually recursive — recursion
  • naberezhnye chelny — a port in the Tatar Autonomous Republic, in the Russian Federation in Asia,e of Kazan, on the Kama River.
  • neurophysiological — the branch of physiology dealing with the functions of the nervous system.
  • neuropsychodynamic — Of or pertaining to neuropsychodynamics.
  • neuropsychological — Of or pertaining to neuropsychology, the relation or combination of brain and mind.
  • nobiliary particle — a preposition forming part of a title of nobility or surname, as French de or German von.
  • non-accountability — the state of being accountable, liable, or answerable.
  • nonachlorobiphenyl — (organic compound) Either of three isomers of the polychlorinated biphenyl containing nine chlorine atoms.
  • nuclear capability — If a country has nuclear capability, it is able to produce nuclear power and usually nuclear weapons.
  • numerical analysis — the branch of mathematics dealing with methods for obtaining approximate numerical solutions of mathematical problems.
  • numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
  • numerical taxonomy — classification of organisms by a comparison of large numbers of observable characteristics that are given equal value instead of being weighted according to possible evolutionary significance.
  • nursery facilities — places where young children are looked after
  • octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
  • officer of the day — an officer who has charge of the guard and prisoners on an assigned day at a military installation. Abbreviation: OD, O.D., O.O.D.
  • omega-3 fatty acid — a polyunsaturated fatty acid, essential for normal retinal function, that influences various metabolic pathways, resulting in lowered cholesterol and triglyceride levels, inhibited platelet clotting, and reduced inflammatory and immune reactions.
  • on a sticky wicket — in an awkward situation
  • ophthalmologically — In an ophthalmological manner.
  • organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
  • oriental cat's-eye — a chatoyant variety of chrysoberyl, used as a gem.
  • oscillographically — By means of oscillography.
  • ovariohysterectomy — Surgical removal of the ovaries and uterus.
  • overdraft facility — a facility (of a bank or building-society cheque account) that allows a withdrawal of money in excess of the account's credit balance
  • passive vocabulary — all the words, collectively, that a person can understand
  • pathologic anatomy — the branch of pathology dealing with the morphologic changes in tissues.
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