13-letter words containing a, b, o, r
- lower abdomen — lowest part of the belly
- lower chamber — lower house.
- lunar orbiter — one of a series of space probes that orbited and photographed the moon in 1966 and 1967.
- lunar rainbow — moonbow.
- luxembourgian — of or relating to Luxembourg, its people, or their language.
- macroglobulin — A plasma globulin of high molecular weight.
- madame bovary — a novel (1857) by Gustave Flaubert.
- major barbara — a comedy (1905) by G. B. Shaw.
- make or break — either completely successful or utterly disastrous: a make-or-break marketing policy.
- make-or-break — either completely successful or utterly disastrous: a make-or-break marketing policy.
- malabar coast — a region along the entire SW coast of India, extending from the Arabian Sea inland to the Western Ghats.
- malabsorbtion — Misspelling of malabsorption.
- malabsorption — faulty absorption of nutritive material from the intestine.
- mandibuliform — Having the form of a mandible; - said especially of the maxill\u00e6 of an insect when hard and adapted for biting.
- mao inhibitor — any of various substances, as isocarboxazid and phenelzine, that block enzymatic breakdown of certain monoamine neurotransmitters: used to treat severe depression. Abbreviation: MAOI.
- marbleization — The process of marbleizing.
- marmalade box — genipap.
- marx brothers — the. a US family of film comedians, esp Arthur Marx, known as Harpo (1888–1964), Herbert Marx, known as Zeppo (1901–79), Julius Marx, known as Groucho (1890–1977), and Leonard Marx, known as Chico (1886–1961). Their films include Animal Crackers (1930), Monkey Business (1931), Horsefeathers (1932), Duck Soup (1933), and A Day at the Races (1937)
- matagorda bay — a bay in SE Texas, at the mouth of the Colorado River, separated from the Gulf of Mexico by the Matagorda Peninsula. About 50 miles (80 km) long.
- matchboarding — a construction of matchboards.
- medical board — a group of people qualified to give opinions on medical matters
- megaherbivore — a large herbivore, such as an elephant, weighing more than 1000kg
- melrose abbey — a ruined Cistercian abbey in Melrose in Scottish Borders: founded in 1136 and sacked by the English in 1385 and 1547: repaired in 1822 by Sir Walter Scott
- membranaceous — Resembling or having properties of a membrane.
- membrane bone — a bone that develops from membranous tissue.
- membranophone — any musical instrument, as a drum, in which the sound is produced by striking, rubbing, or blowing against a membrane stretched over a frame.
- memorabiliast — a person who collects mementos or souvenirs, as postcards or playbills.
- memorableness — Memorability.
- mephobarbital — The drug methylphenobarbital.
- message board — bulletin board system
- metagrobolize — to mystify or puzzle
- methocarbamol — a substance, C 1 1 H 1 5 NO 5 , used as a muscle relaxant in combination with other drugs in the treatment of acute, painful musculoskeletal conditions.
- microbalances — Plural form of microbalance.
- microbarogram — a record made by a microbarograph.
- microfilmable — Suitable for storage on microfilm.
- microhabitats — Plural form of microhabitat.
- microwaveable — Alternative spelling of microwavable.
- misobservance — a failure to observe thoroughly or properly
- molding board — a board upon which bread is kneaded, cookies prepared, etc.
- mortgage bond — a bond secured by a mortgage on real estate or other property.
- mother abbess — the female head of a religious house of nuns
- mount gambier — a city in S Australia.
- 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.
- mourning band — a piece of black material, esp an armband, worn to indicate that the wearer is in mourning
- mouthbreather — a person who breathes through the mouth instead of through the nose
- multivibrator — A device consisting of two amplifying transistors or valves, each with its output connected to the input of the other, producing an oscillatory signal.
- mycobacterial — (medicine) Of or pertaining to mycobacteria.
- mycobacterium — A bacterium of a group that includes the causative agents of leprosy and tuberculosis.
- myofibroblast — (cytology) A cell that is intermediate between a fibroblast and smooth muscle.