13-letter words containing r, o, t, u, n
- long trousers — full-length trousers (as opposed to shorts)
- low countries — the lowland region of W Europe, on the North Sea: consists of Belgium, Luxembourg, and the Netherlands
- lubber's knot — an improperly made reef or square knot, likely to slip loose.
- lunar orbiter — one of a series of space probes that orbited and photographed the moon in 1966 and 1967.
- lunch counter — a counter, as in a store or restaurant, where light meals and snacks are served or are sold to be taken out.
- lycanthropous — Lycanthropic.
- macromutation — 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.
- macronucleate — having a macronucleus.
- macronutrient — Nutrition. any of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
- magnetiferous — (dated) Producing or conducting magnetism.
- manufactories — Plural form of manufactory.
- matriculation — to enroll in a college or university as a candidate for a degree.
- merleau-ponty — Maurice, 1908–61, French phenomenological philosopher.
- micronucleate — having a micronucleus.
- micronutrient — an essential nutrient, as a trace mineral or vitamin, that is required by an organism in minute amounts.
- micropuncture — the puncture of a cell, renal tubule, etc., by a laser beam or micropipette
- minicomputers — a computer with processing and storage capabilities smaller than those of a mainframe but larger than those of a microcomputer.
- misconjecture — the formation or expression of an opinion or theory without sufficient evidence for proof.
- misconstruing — Present participle of misconstrue.
- misunderstood — improperly understood or interpreted.
- monetary unit — the standard unit of value of the currency of a country, as the dollar in the U.S. and the franc in France.
- money to burn — more money than one needs
- monmouthshire — a historic county in E Wales, now part of Gwent, Mid Glamorgan, and South Glamorgan.
- monosaturated — (organic chemistry, of a glyceride) Having one saturated fatty acid.
- monotrematous — of or relating to a monotreme.
- mons serratus — a mountain in NE Spain, northwest of Barcelona: famous Benedictine monastery. Height: 1235 m (4054 ft)
- monster truck — a pick-up truck with extremely large tyres, often used for racing over rough terrain
- monstrousness — frightful or hideous, especially in appearance; extremely ugly.
- mordant rouge — a solution of aluminum acetate in acetic acid, used in dyeing and calico printing.
- mother nature — a personification of the forces of nature as a controlling and regulating maternal being, sometimes creative and caring.
- mother tongue — the language first learned by a person; native language.
- motherfucking — a mean, despicable, or vicious person.
- mount aragats — a volcanic mountain in NW Armenia. Height: 4090 m (13 419 ft)
- mount everest — Mount, a mountain in S Asia, on the boundary between Nepal and Tibet, in the Himalayas: the highest mountain in the world. 29,028 feet (8848 meters).
- mount gambier — a city in S Australia.
- mount markham — a mountain in Antarctica, in Victoria Land. Height: 4350 m (14 272 ft)
- mount palomar — Mount, a mountain in S California, NE of San Diego: site of observatory. 6126 feet (1867 meters) high.
- mount rainier — Mount, a volcanic peak in W Washington, in the Cascade Range. 14,408 feet (4392 meters).
- mountainboard — a type of skateboard specially designed for rough terrain and steep slopes, having four large wheels linked by a suspension system
- mountebankery — The practices of a mountebank; quackery; boastful and vain pretenses.
- mousetrapping — Present participle of mousetrap.
- mouthwatering — very appetizing in appearance, aroma, or description: a mouth-watering dessert.
- multi-sensory — of or relating to the senses or sensation.
- multiregional — of, relating to or involving several regions
- multitrillion — a number or amount equal to several trillion
- muniment room — a storage or display room in a castle, church, university, or the like, where pertinent historical documents and records are kept.
- munroe effect — the reinforcement of shock waves in the concave, hollow end of a shaped charge, producing a greater resultant wave and concentrating the explosion along the axis of the charge.
- muon neutrino — a type of neutrino that obeys a conservation law together with the muon, with the total number of muons and muon-neutrinos minus the total number of their antiparticles remaining constant.
- muon-neutrino — a type of neutrino that obeys a conservation law together with the muon, with the total number of muons and muon-neutrinos minus the total number of their antiparticles remaining constant.
- mushroom town — a town that has grown very quickly