16-letter words containing o, r, a, i
- legal separation — judicial separation.
- lenticular cloud — a very smooth, round or oval, lens-shaped cloud that is often seen, singly or stacked in groups, near a mountain ridge.
- leptosporangiate — (of ferns) having each sporangium developing from a single cell, rather than from a group, and normally with specialized explosive spore dispersal
- letter of advice — a notification from a consignor to a consignee giving specific information as to a shipment, the name of the carrier, the date shipped, etc.
- levallois-perret — a suburb of Paris, in N France, on the Seine.
- libation-bearers — Choëphori.
- liberal democrat — In Britain, a Liberal Democrat is a member of the Liberal Democrat Party.
- liberal unionist — a Liberal who opposed Gladstone's policy of Irish Home Rule in 1886 and after
- lick observatory — the astronomical observatory of the University of California, situated on Mount Hamilton, near San Jose, California, and having a 120-inch (3-meter) reflecting telescope and a 36-inch (91-cm) refracting telescope.
- limited monarchy — a monarchy that is limited by laws and a constitution.
- limited-monarchy — a limited train, bus, etc.
- lissajous figure — the series of plane curves traced by an object executing two mutually perpendicular harmonic motions.
- listen to reason — be persuaded
- literacy project — a project, plan or scheme to increase literacy in a country, area, etc
- lithographically — In the manner of lithography.
- little brown bat — any of several small to medium-sized common bats of the genera Myotis and Eptesicus, found worldwide in caves, trees, and buildings, including M. lucifugus (little brown bat) and E. fuscus (big brown bat) a widespread North American species.
- littoral warfare — military combat conducted in coastal areas.
- loan translation — the process whereby a compound word or expression is created by literal translation of each of the elements of a compound word or expression in another language, as marriage of convenience from French mariage de convenance.
- local oscillator — the oscillator in a superheterodyne receiver whose output frequency is mixed with the incoming modulated radio-frequency carrier signal to produce the required intermediate frequency
- locomotor ataxia — tabes dorsalis.
- logical operator — any of the Boolean symbols or functions, as AND, OR, and NOT, denoting a Boolean operation; Boolean operator.
- logical relation — A relation R satisfying f R g <=> For all a, b, a R b => f a R g b This definition, by Plotkin, can be used to extend the definition of a relation on the types of a and b to a relation on functions.
- loire-atlantique — a department in NW France. 2695 sq. mi. (6980 sq. km). Capital: Nantes.
- long-wire aerial — a travelling-wave aerial consisting of one or more conductors, the length of which usually exceeds several wavelengths
- lord chamberlain — (in Britain) the chief official of the royal household
- lord howe island — an island in the S Pacific, E of Australia: a dependency of New South Wales. 5 sq. mi. (13 sq. km).
- lord proprietary — (in Colonial America) an owner, governor, or grantee of a proprietary colony
- lords-and-ladies — (used with a singular verb) cuckoopint.
- lost river range — a mountain range in E central Idaho. Highest peak, Borah Peak (also highest in the state), 12,662 feet (3862 meters).
- louisiana french — French as spoken in Louisiana; Cajun. Abbreviation: LaF.
- lower california — Baja California.
- lower palatinate — See under Palatinate (def 1).
- lymphangiography — x-ray visualization of lymph vessels and nodes following injection of a contrast medium.
- machine operator — someone who operates mechanical equipment
- macro-linguistic — a field of study concerned with language in its broadest sense and including cultural and behavioral features associated with language.
- macroclimatology — the study of the climatic conditions of a large area.
- macroenvironment — (biology) The large-scale and long-term environment and conditions that affect an organism.
- macroinstruction — macro (def 5).
- macrolepidoptera — a collector's name for that part of the lepidoptera that comprises the butterflies and the larger moths (noctuids, geometrids, bombycids, springtails, etc): a term without taxonomic significance
- macrolinguistics — a field of study concerned with language in its broadest sense and including cultural and behavioral features associated with language.
- macrorestriction — In physical gene mapping, the digestion of DNA of high molecular weight with a restriction enzyme having a low number of restriction sites.
- magnesiochromite — (mineral) A chromite species with the formula MgCr2O4.
- magnetic equator — aclinic line.
- magneto-electric — of or relating to the induction of electric current or electromotive force by means of permanent magnets.
- magnetochemistry — the study of magnetic and chemical phenomena in their relation to one another.
- magnetoresistive — Of or pertaining to magnetoresistance.
- magnetostriction — a change in dimensions exhibited by ferromagnetic materials when subjected to a magnetic field.
- magnetostrictive — Of or pertaining to magnetostriction.
- magnolia warbler — a black and yellow wood warbler, Dendroica magnolia, of North America.
- maid of all work — a maid who does all types of housework