18-letter words containing r, e, t, a
- linear combination — a sum of products of each quantity times a constant: The expression aX + bY + cZ is a linear combination of X, Y, and Z, where a, b, and c are constants.
- linear perspective — a mathematical system for representing three-dimensional objects and space on a two-dimensional surface by means of intersecting lines that are drawn vertically and horizontally and that radiate from one point (one-point perspective) two points (two-point perspective) or several points on a horizon line as perceived by a viewer imagined in an arbitrarily fixed position.
- liqueur chocolates — chocolates containing liqueur
- literae humaniores — (at Oxford University) the faculty concerned with Greek and Latin literature, ancient history, and philosophy; classics
- literal-mindedness — the quality or state of tending to take words in their literal sense
- literary criticism — study and review of literature
- little st. bernard — Great, a mountain pass between SW Switzerland and NW Italy, in the Pennine Alps: Napoleon led his army through it in 1800; location of a hospice. 8108 feet (2470 meters) high.
- local area network — a system for linking private telecommunications equipment, as in a building or cluster of buildings.
- lone-parent family — a family in which there is only one parent
- lonely hearts club — a club for people who are trying to find a lover or a friend
- look the other way — look in the opposite direction
- loosestrife family — the plant family Lythraceae, characterized by herbaceous plants, shrubs, and trees having usually opposite or whorled, simple leaves, clusters of flowers, and fruit in the form of a capsule, and including the crape myrtle, loosestrifes of the genus Lythrum, and the henna shrub.
- low-start mortgage — a mortgage in which interest only is repaid for a fixed period at the outset, to make it more affordable
- lowell observatory — the astronomical observatory, situated in Flagstaff, Arizona, at which Pluto was discovered in 1930.
- lower klamath lake — See under Klamath Lakes.
- lower palaeolithic — the earliest of the three sections of the Palaeolithic, beginning about 3 million years ago and ending about 70 000 bc with the emergence of Neanderthal man
- lunitidal interval — the period of time between the moon's transit and the next high lunar tide.
- macroinvertebrates — Plural form of macroinvertebrate.
- magistrate's court — a court having limited jurisdiction over minor civil and criminal matters, as matters of contract not exceeding a particular amount of money.
- magistrates' court — law: handles minor crimes
- magnesium arsenate — a white, water-insoluble powder, Mg 3 (AsO 4) 2 ⋅xH 2 O, used chiefly as an insecticide.
- magnesium stearate — Magnesium stearate is a salt that is often used as a diluent and lubricant in tablets and capsules.
- magnetic amplifier — an amplifier that applies the input signal to a primary winding and feeds an alternating current to a secondary winding where this current is modulated by the variations in the primary winding.
- magnetic recording — the process of recording sound or other data on magnetic tape, wire, etc.
- magnetic resonance — the response by atoms, molecules, or nuclei subjected to a magnetic field to radio waves or other forms of energy: used in medicine for scanning
- magnetic variation — variation (def 8).
- magnetocrystalline — (physics) Describing the interaction between the magnetization and the crystal structure of a material.
- magnetoelectricity — electricity developed by the action of magnets.
- magnetorheological — (physics) describing a substance whose rheological properties are modified by a magnetic field.
- major tranquilizer — antipsychotic (def 2).
- make a practice of — be in the habit of
- make heavy weather — to bring into existence by shaping or changing material, combining parts, etc.: to make a dress; to make a channel; to make a work of art.
- make matters worse — If you say that something makes matters worse, you mean that it makes a difficult situation even more difficult.
- make short work of — exertion or effort directed to produce or accomplish something; labor; toil.
- make someone tired — to annoy or vex someone
- management trainee — somebody who is training to become a manager of a company, business, etc
- manchester terrier — one of a breed of slender terriers having a short, glossy, black-and-tan coat, raised originally in Manchester, England.
- mandelbrot, benoit — Benoit Mandelbrot
- manufactured goods — products made by machine
- manufacturing base — the manufacturing industries of an area or a country considered as a unit and a constituent part of the economy
- many happy returns — When it is someone's birthday, people sometimes say 'Many happy returns' to them as a way of greeting them.
- margaret of valois — ("Queen Margot") 1533–1615, 1st wife of Henry IV of France: queen of Navarre; patron of science and literature (daughter of Henry II of France and Catherine de' Medici).
- marine underwriter — an underwriter who specializes in marine insurance
- maritime provinces — region in Canada
- market opportunity — a situation in which a company can meet an unsatisfied customer need before its competitors
- marketing campaign — a series of coordinated activities designed to help market a product
- marketing research — the study of influences upon customer and consumer behaviour and the analysis of market characteristics and trends
- marketing strategy — a general plan or set of plans dealing with marketing, especially over a long period
- marriage encounter — a meeting with a person or thing, especially a casual, unexpected, or brief meeting: Our running into each other was merely a chance encounter.
- master boot record — (operating system, storage) A special area on a computer's main hard disk that gives the location of the disk's boot block or bootable partition where the operating system is installed.