12-letter words containing or
- arborio rice — variety of round-grain rice used for making risotto
- arborization — a branching treelike appearance in certain fossils and minerals
- arch support — a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- armed forces — The armed forces or the armed services of a country are its military forces, usually the army, navy, marines, and air force.
- armor-plated — An armor-plated vehicle or building has a hard metal covering in order to protect it from gunfire and other missiles.
- armored rope — rope made of wire-wrapped hempen strands that is used in salvage work.
- army cutworm — the larva of a noctuid moth, Chorizagrotis auxiliaris, that is a pest of wheat and alfalfa in the Plains states.
- array theory — (theory) A theory developed by Trenchard More Jr. and used as the basis for the NIAL language. Papers are available from the IBM Cambridge Scientific Center, Cambridge MA.
- art director — a person responsible for the sets and costumes in a film
- arthrospores — an isolated vegetative cell that has passed into a resting state, occurring in bacteria and not regarded as a true spore.
- articulators — Plural form of articulator.
- articulatory — an act or the process of articulating: the articulation of a form; the articulation of a new thought.
- assassinator — a person who assassinates
- assessorship — the occupation, post or duties of a person who assesses, advises, or estimates
- assimilators — Plural form of assimilator.
- assimilatory — characterized by assimilation; assimilating.
- assortedness — the position of being sorted, grouped or harmonized with, well or badly, or provided with a good or bad assortment or mixture
- at the worst — bad or ill in the highest, greatest, or most extreme degree: the worst person.
- atheoretical — having no connection with and not founded on theory
- atorvastatin — a statin, (C 33 H 34 FN 2 O 5) 2 ·Ca 3 H 2 O, used in the prevention and treatment of heart disease.
- attenborough — Sir David. born 1926, British naturalist and broadcaster; noted esp for his TV series Life on Earth (1978), The Living Planet (1983), The Life of Birds (1998), The Life of Mammals (2002), and First Life (2010)
- attorneyship — The office or profession of an attorney.
- auditorially — Anatomy, Physiology. pertaining to hearing, to the sense of hearing, or to the organs of hearing.
- auroral zone — the region surrounding the north or south geomagnetic pole in which the auroral phenomena take place.
- autapomorphy — (cladistics) A derived trait that is unique to a particular taxon.
- authorizable — able to be authorized
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- automorphism — the practice of seeing others as having the same characteristics as oneself
- autoreactive — (immunology, medicine) Acting against the organism by which it was produced.
- autorhythmic — That generates its own rhythm.
- autorickshaw — (in India) a light three-wheeled vehicle driven by a motorcycle engine
- autorotation — the continuous rotation of a body in an airflow, such as that of the rotor blades of a helicopter in an unpowered descent
- averruncator — a long pair of shears used for pruning the higher branches of trees
- baby monitor — a device that transmits sounds made by a baby to another room
- bachelor pad — a flat in which a bachelor lives
- bachelorette — A bachelorette is a woman who has never married.
- bachelorhood — the state of being a bachelor.
- bachelorship — the state of being a bachelor; bachelorhood
- backswordman — a person who uses a backsword.
- bagworm moth — any moth of the family Psychidae
- barnstormers — Plural form of barnstormer.
- barnstorming — A barnstorming performance is full of energy and very exciting to watch.
- barophoresis — the diffusion of suspended particles at a rate dependent on external forces
- baroreceptor — a collection of sensory nerve endings, principally in the carotid sinuses and the aortic arch, that monitor blood pressure changes in the body
- barrel organ — A barrel organ is a large machine that plays music when you turn the handle on the side. Barrel organs used to be played in the street to entertain people.
- basidiospore — one of the spores, usually four in number, produced in a basidium
- bastardsword — Alternative spelling of bastard sword.
- battleworthy — capable of engaging in combat; ready for battle: a decline in the nation's battleworthy forces.