15-letter words containing m, o
- autodidacticism — any self-directed learning or self-education
- automata theory — the formal study of the power of computation of abstract machines
- automatic drive — an automotive transmission requiring either very little or no manual shifting of gears.
- automatic focus — a system in a camera which automatically adjusts the lens so that the object being photographed is in focus, often one using infrared light to estimate the distance of the object from the camera
- automatic pilot — An automatic pilot or an autopilot is a device in an aircraft that automatically keeps it on a particular course.
- automatic rifle — a type of light machine gun capable of firing automatically or in single shots.
- automorphically — in an automorphic manner
- autorhythmicity — The quality of being autorhythmic, or generating its own rhythm, as for example the cells of the cardiac muscle do.
- autotransformer — a transformer in which part of the winding is common to both primary and secondary circuits
- axiom of choice — the axiom of set theory that given any collection of disjoint sets, a set can be so constructed that it contains one element from each of the given sets.
- azobisformamide — (chemistry) azodicarbonamide.
- azuchi-momoyama — a period of Japanese art, 1568–1600, characterized by construction of imposing, elegant castles and small, unadorned teahouses, lavish decorative arts, and bright-colored painting.
- baconian method — induction (def 4a).
- badminton court — the court on which games of badminton are played
- ball ammunition — live small-arms ammunition
- balloon payment — a large payment that concludes a series of smaller payments, for example in order to repay a loan
- ballroom dancer — a person who participates in ballroom dancing
- baptism of fire — If someone who has just begun a new job has a baptism of fire, they immediately have to cope with very many severe difficulties and obstacles.
- bar examination — a written examination to determine if one is qualified to practice law in a particular jurisdiction.
- barium chloride — a poisonous compound, BaCl2, consisting of flat white crystals that are soluble in water: it is used to treat water, metals, leather, etc.
- barium chromate — a yellow, crystalline compound, BaCrO 4 , used as a pigment (barium yellow)
- barium peroxide — a gray-white powder, BaO2, used as a bleach and in making hydrogen peroxide
- barothermograph — an automatic instrument for recording pressure and temperature.
- barry mountains — a mountain range in SE Australia, in E Victoria: part of the Australian Alps
- basidiomycetous — belonging or pertaining to the basidiomycetes.
- basse-normandie — a region of NW France, on the English Channel: consists of the Cherbourg peninsula in the west rising to the Normandy hills in the east; mainly agricultural
- bathing costume — A bathing costume is a piece of clothing that is worn for swimming, especially by women and girls.
- bathroom scales — scales typically kept in a bathroom for people to weigh themselves
- bathythermogram — a record made by a bathythermograph.
- bay of campeche — the SW part of the Gulf of Mexico
- be of two minds — to be undecided or irresolute
- beam-power tube — a vacuum tube in which the stream of electrons flowing to the plate is focused by the action of a set of auxiliary, charged elements, giving an increase in output power.
- bear comparison — to be sufficiently similar in class or range to be compared with (something else), esp favourably
- beat one's gums — to talk much and idly
- beat one's meat — to masturbate
- bedroom slipper — a soft shoe worn in the house
- before the mast — as an apprentice seaman
- bergamot orange — a small Asian spiny rutaceous tree, Citrus bergamia, having sour pear-shaped fruit
- bevelled mirror — a mirror with a bevelled edge
- bide one's time — to wait patiently for an opportunity
- billings method — a natural method of birth control that involves examining the colour and viscosity of the cervical mucus to discover when ovulation is occurring
- binomial series — an infinite series obtained by expanding a binomial raised to a power that is not a positive integer.
- bioaccumulation — the process in which industrial waste, toxic chemicals, etc. gradually accumulate in living tissue
- biogeochemistry — the science of biological, chemical, and geological aspects of the environment
- bioluminescence — the production of light by living organisms as a result of the oxidation of a light-producing substance (luciferin) by the enzyme luciferase: occurs in many marine organisms, insects such as the firefly, etc
- biomathematical — relating to biomathematics
- biomechanically — from a biomechanical point of view
- bit-mapped font — a computer font whose characters are held in memory as series of dots.
- bituminous coal — a soft black coal, rich in volatile hydrocarbons, that burns with a smoky yellow flame. Fixed carbon content: 46–86 per cent; calorific value: 1.93 × 107 – 3.63 × 107 J/kg
- black guillemot — a common guillemot, Cepphus grylle: its summer plumage is black with white wing patches and its winter plumage white with greyish wings