13-letter words containing h, a, e, m
- lead chromate — a yellow crystalline compound, PbCrO 4 , toxic, insoluble in water: used as an industrial paint pigment.
- leigh-mallory — Sir Trafford Leigh [traf-erd lee] /ˈtræf ərd li/ (Show IPA), 1892–1944, British Air Force officer.
- leishmaniasis — any infection caused by a protozoan of the genus Leishmania.
- leishmaniosis — Alt form leishmaniasis.
- liebfraumilch — a white wine produced chiefly in the region of Hesse in Germany.
- light mineral — any rock-forming mineral that has a specific gravity of less than 2.8 and is generally light in color.
- lighthouseman — a lighthouse keeper
- loathsomeness — The property or nature that gives rise to revulsion, that inspires loathing.
- lower chamber — lower house.
- lucifer match — friction match.
- luncheon meat — any of various sausages or molded loaf meats, usually sliced and served cold, as in sandwiches or as garnishes for salads.
- lymphadenitis — inflammation of a lymphatic gland.
- maccheroncini — thin pasta tubes made from wheat flour
- machiavellian — of, like, or befitting Machiavelli.
- machiavellism — of, like, or befitting Machiavelli.
- machine cycle — (processor) The four steps which the CPU carries out for each machine language instruction: fetch, decode, execute, and store. These steps are performed by the control unit, and may be fixed in the logic of the CPU or may be programmed as microcode which is itself usually fixed (in ROM) but may be (partially) modifiable (stored in RAM). The fetch cycle places the current program counter contents (the address of the next instruction to execute) on the address bus and reads in the word at that location into the instruction register (IR). In RISC CPUs instructions are usually a single word but in other architectures an instruction may be several words long, necessitating several fetches. The decode cycle uses the contents of the IR to determine which gates should be opened between the CPU's various functional units and busses and what operation the ALU(s) should perform (e.g. add, bitwise and). Each gate allows data to flow from one unit to another (e.g. from register 0 to ALU input 1) or enables data from one output onto a certain bus. In the simplest case ("horizontal encoding") each bit of the instruction register controls a single gate or several bits may control the ALU operation. This is rarely used because it requires long instruction words (such an architecture is sometimes called a very long instruction word architecture). Commonly, groups of bits from the IR are fed through decoders to control higher level aspects of the CPU's operation, e.g. source and destination registers, addressing mode and ALU operation. This is known as vertical encoding. One way RISC processors gain their advantage in speed is by having simple instruction decoding which can be performed quickly. The execute cycle occurs when the decoding logic has settled and entails the passing of values between the various function units and busses and the operation of the ALU. A simple instruction will require only a single execute cycle whereas a complex instruction (e.g. subroutine call or one using memory indirect addressing) may require three or four. Instructions in a RISC typically (but not invariably) take only a single cycle. The store cycle is when the result of the instruction is written to its destination, either a register or a memory location. This is really part of the execute cycle because some instructions may write to multiple destinations as part of their execution.
- machine error — an error caused by a fault or defect in a machine rather than by human error
- machine screw — a threaded fastener, either used with a nut or driven into a tapped hole, usually having a diameter of about 1/4 inch (6.4 mm) or less and a slotted head for tightening by a screwdriver.
- machine-steel — low-carbon steel that can be easily machined.
- machinegunned — Simple past tense and past participle of machinegun.
- macrencephaly — The presence of an abnormally large brain.
- macrocephalic — Cephalometry. being or having a head with a large cranial capacity.
- macrocephalus — Alternative spelling of macrocephalous.
- macrolecithal — megalecithal.
- magma chamber — a reservoir of magma in the earth's crust where the magma may reside temporarily on its way from the upper mantle to the earth's surface
- magnet school — a public school with special programs and instruction that are not available elsewhere in a school district and that are specially designed to draw students from throughout a district, especially to aid in desegregation.
- magnetic head — head (def 33).
- magnetographs — Plural form of magnetograph.
- magnetosheath — the region between the magnetopause of the earth or of some other planet and the shock front caused by the solar wind.
- magnetosphere — the outer region of the earth's ionosphere, where the earth's magnetic field controls the motion of charged particles, as in the Van Allen belts. Compare magnetopause.
- maiden speech — the first speech made in a legislature by a newly elected member.
- major prophet — any of a group of Old Testament prophets, including Isaiah, Jeremiah, and Ezekiel.
- make a splash — If you make a splash, you become noticed or become popular because of something that you have done.
- make light of — of little weight; not heavy: a light load.
- make mischief — cause trouble
- make off with — take away
- mana motuhake — independence or autonomy
- mango chutney — chutney which contains or is made from the fruit mango
- manhole cover — a removable metal plate covering a shaft that leads down to a sewer or drain
- mannheim gold — a brass alloy used to imitate gold; red brass.
- mansion house — the residence of the Lord Mayor of London
- mantelshelves — Plural form of mantelshelf.
- maple heights — a city in NE Ohio.
- marbled white — any butterfly of the satyrid genus Melanargia, with panelled black-and-white wings, but technically a brown butterfly; found in grassland
- marchionesses — Plural form of marchioness.
- mare chronium — an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
- maria theresa — 1717–80, archduchess of Austria; queen of Hungary and Bohemia 1740–80 (wife of Francis II; mother of Joseph II, Leopold II, Marie Antoinette).
- marsh harrier — a European harrier, Circus aeruginosus, that frequents marshy regions
- marsh trefoil — buck bean.
- martin luther — Martin [mahr-tn;; German mahr-teen] /ˈmɑr tn;; German ˈmɑr tin/ (Show IPA), 1483–1546, German theologian and author: leader, in Germany, of the Protestant Reformation.