15-letter words containing a, d, r, m
- massed practice — learning with no intervals or short intervals between successive bouts of learning
- master cylinder — the hydraulic pump of an automotive braking system that contains a cylinder and one or two pistons, is actuated by the brake pedal, and supplies hydraulic fluid under pressure to the brakes at each wheel.
- master's degree — a degree awarded by a graduate school or department, usually to a person who has completed at least one year of graduate study.
- mastoid process — a large, bony prominence on the base of the skull behind the ear, containing air spaces that connect with the middle ear cavity.
- maternity dress — a dress worn by a pregnant woman and which is designed to allow for the changes in body size which take place during pregnancy
- matrix bar code — a type of 2D bar code that stores data in a matrix of geometrically shaped dark and light cells that represent bits. See also QR code.
- maundy thursday — the Thursday of Holy Week, commemorating Jesus' Last Supper and His washing of the disciples' feet upon that day.
- meadow mushroom — any of various fleshy fungi including the toadstools, puffballs, coral fungi, morels, etc.
- medal for merit — a medal awarded by the U.S. to a civilian for distinguished service to the country: discontinued after World War II.
- media converter — (networking) A component used in Ethernet, although it is not part of the IEEE standard. The IEEE standard states that all segments must be linked with repeaters. Media converters were developed as a simpler, cheaper alternative to repeaters. However, in the 1990s the cost difference between the two is negligible.
- medical history — the past background of a person in terms of health
- medical officer — a doctor of medicine who serves in the armed forces in a medical capacity
- medical records — written information about a person's health during their life to date
- medical tourism — tourist travel for the purpose of receiving medical treatment or improving health or fitness: The spiraling cost of healthcare has contributed to the growth of medical tourism. Also called health tourism.
- medieval breton — the Breton language of the Middle Ages, usually dated from the 12th to the mid-17th centuries.
- medieval hebrew — the Hebrew language as used from the 6th to the 13th centuries a.d.
- medullary canal — the central area of a bone, containing marrow
- mental disorder — any of the various forms of psychosis or severe neurosis.
- meridian circle — a transit instrument provided with a graduated vertical scale, used to measure the declinations of heavenly bodies and to determine the time of meridian transits.
- mermaid's purse — the horny or leathery egg case of certain cartilaginous fishes, as skates.
- metamorphosised — Simple past tense and past participle of metamorphosise.
- michael faraday — Michael, 1791–1867, English physicist and chemist: discoverer of electromagnetic induction.
- micromicrofarad — picofarad. Symbol: μμF.
- microradiograph — an enlarged version of an image obtained by a form of radiography that reveals minute details
- mid-ocean ridge — any of several seismically active submarine mountain ranges that extend through the Atlantic, Indian, and South Pacific oceans: each is hypothesized to be the locus of seafloor spreading.
- middle american — average middle-class Americans as a group, as distinguished from the rich or poor or the politically extreme.
- midgard serpent — a serpent, the child of Loki and Angerboda, who lies wrapped around the world, tail in mouth, and is destined to kill and to be killed by Thor at Ragnarok; Jormungand.
- midsummer's day — Midsummer's Day or Midsummer Day is the 24th of June.
- mineral kingdom — minerals collectively.
- minidisc player — a device for playing minidiscs
- minority leader — the party member who directs the activities of the minority party on the floor of a legislative body, as of the U.S. Congress.
- mis-categorized — to arrange in categories or classes; classify.
- misapprehending — Present participle of misapprehend.
- misappropriated — to put to a wrong use.
- miscoordinating — of the same order or degree; equal in rank or importance.
- miscoordination — Lack of coordination.
- missile address — ICBM address
- modal auxiliary — Grammar. any of the group of English auxiliary verbs, including can, could, may, might, shall, should, will, would, and must, that are used with the base form of another verb to express distinctions of mood.
- moderate breeze — a wind of 13–18 miles per hour (5.8–8 m/sec).
- moderate-income — of or relating to those with a close-to-average income within the overall population.
- modern language — one of the literary languages currently in use in Europe, as French, Spanish, or German, treated as a departmental course of study in a school, college, or university.
- modulo operator — (mathematics) (mod) The operator that returns the remainder after integer division of its first argument by its second. Written as "%" in C and some other languages. Where the second argument is a power of two, the result can be calculated much more quickly using bitwise and with the appropriate bit-mask.
- mogi das cruzes — a city in SE Brazil, E of São Paulo.
- mole salamander — ambystomid.
- molecular cloud — a cool dense interstellar region composed of a wide variety of molecules, mainly hydrogen, plus some dust, in which stars are forming
- mollier diagram — a graph showing the enthalpy of a substance as a function of its entropy when some physical property of the substance, as temperature or pressure, is kept at a specified constant value.
- monosaccharides — Plural form of monosaccharide.
- monounsaturated — of or noting a class of fats that lack a hydrogen bond at one point on the carbon chain and that are associated with a low cholesterol content of the blood.
- moral turpitude — conduct that is regarded as immoral.
- morbidity table — A morbidity table is a statistical table that shows the proportion of people that are expected to become sick or injured at each age.