14-letter words containing o, r, a, i
- lower sideband — the frequency band below the carrier frequency, within which fall the spectral components produced by modulation of a carrier wave
- lower silurian — Ordovician
- lugger topsail — a fore-and-aft topsail used above a lugsail.
- luminous range — the distance at which a certain light, as that of a lighthouse, is visible in clear weather, disregarding interference from obstructions and from the curvature of the earth and depending on the power of the light.
- lymphangiogram — an X-ray of the lymphatic system taken after a contrast agent has been injected, often used to diagnose lymphoma
- macaroni wheat — durum wheat.
- machado y ruiz — Antonio [ahn-taw-nyaw] /ɑnˈtɔ nyɔ/ (Show IPA), 1875–1939, Spanish writer.
- mackinaw trout — lake trout.
- macro-mutation — a mutation that has a profound effect on the resulting organism, as a change in a regulatory gene that controls the expression of many structural genes.
- macro-organism — an organism that can be seen with the naked eye.
- macrobiologist — One who studies macrobiology.
- macroeconomics — the branch of economics dealing with the broad and general aspects of an economy, as the relationship between the income and investments of a country as a whole.
- macroevolution — major evolutionary transition from one type of organism to another occurring at the level of the species and higher taxa.
- macroglobulins — Plural form of macroglobulin.
- macromarketing — marketing concerning all marketing as a whole, marketing systems, and the mutual effect that society and marketing systems have on each other
- macronutrients — Plural form of macronutrient.
- macrosociology — the sociological study of large-scale social systems and long-term patterns and processes.
- macrosporangia — Plural form of macrosporangium.
- magic mushroom — a mushroom, Psilocybe mexicana, of Mexico and the southwestern U.S., containing the hallucinogen psilocybin.
- magnetic force — the repelling or attracting force between a magnet and a ferromagnetic material, between a magnet and a current-carrying conductor, etc.
- magnetic north — north as indicated by a magnetic compass, differing in most places from true north.
- magnetic storm — a temporary disturbance of the earth's magnetic field, induced by radiation and streams of charged particles from the sun.
- magnetospheric — Of, pertaining to, or happening within the magnetosphere.
- maid of honour — A maid of honour is the chief bridesmaid at a wedding.
- main door flat — a flat in a tenement that can be accessed directly from outside rather than one which can only be accessed via a communal stairwell
- maine-et-loire — a department in W France. 2787 sq. mi. (7220 sq. km). Capital: Angers.
- maitre d'hotel — a headwaiter.
- major delivery — (programming) A (chiefly British) synonym for major release. E.g, the ninth major release of a piece of software might be called MD9. The release notation would be "v9.0".
- major mitchell — an Australian cockatoo, Kakatoe leadbeateri, with a white-and-pink plumage
- major seminary — a Roman Catholic theological college devoted to training for the priesthood and usually offering a six-year program emphasizing philosophy and theology.
- malapportioned — (of a state or other political unit) poorly apportioned, especially divided, organized, or structured in a manner that prevents large sections of a population from having equitable representation in a legislative body.
- malappropriate — inappropriate
- malleable iron — malleable cast iron.
- malnourishment — Malnutrition, undernourishment.
- manic disorder — a type of affective disorder characterized by euphoric mood, excessive activity and talkativeness, impaired judgment, and sometimes psychotic symptoms, as grandiose delusions.
- manometrically — Using a manometer.
- manuel noriega — Manuel Antonio, born 1934, military leader of Panama 1983–89: captured by U.S. forces and sentenced to prison for drug trafficking 1992.
- map projection — a projecting or protruding part. Synonyms: overhang, protrusion, jut.
- margaritaceous — resembling mother-of-pearl; pearly.
- margin account — an account opened by a customer with a brokerage house in which listed securities can be purchased on margin.
- mariano arista — Mariano [mah-ryah-naw] /mɑˈryɑ nɔ/ (Show IPA), 1802–55, Mexican general: president of Mexico 1851–53.
- marine biology — science of sea life
- marine geology — the branch of geology dealing with the rocks, sediments, and processes of the floors and margins of the oceans.
- mariotte's law — Boyle's law.
- marriage bonds — the strong feeling of being united that is associated with marriage
- marsh marigold — a yellow-flowered plant, Caltha palustris, of the buttercup family, growing in marshes and meadows; cowslip.
- marsupial bone — epipubis.
- marsupial mole — a burrowing Australian marsupial of the genus Notoryctes, resembling a common mole in form and behavior.
- mastigophorous — carrying a cane or whip
- mastocarcinoma — carcinoma of the breast.