9-letter words containing o, r, t
- areolated — marked by areolae
- areostyle — (of columned buildings) having a wide intercolumniation equal to four or more diameters of one of the columns
- argentous — of or containing silver in the monovalent state
- argonauts — Classical Mythology. a member of the band of men who sailed to Colchis with Jason in the ship Argo in search of the Golden Fleece.
- argue out — If two or more people argue something out, they discuss it or thoroughly in order to reach a conclusion or decision.
- aristotle — a bottle
- arlington — a county of N Virginia: site of Arlington National Cemetery
- armstrong — Edwin Howard. 1890–1954, US electrical engineer; invented the superheterodyne radio receiver and the FM radio
- aromantic — Not given to experiencing romantic attraction to others.
- aromatase — an enzyme that converts testosterone into an oestrogen
- aromatics — Plural form of aromatic.
- aromatise — Alternative spelling of aromatize.
- aromatize — to make aromatic
- aroostook — river in N Me., flowing into the St. John River in New Brunswick, Canada: c. 140 mi (225 km)
- arrestors — Plural form of arrestor.
- arrogated — Simple past tense and past participle of arrogate.
- arrogates — Third-person singular simple present indicative form of arrogate.
- arrowroot — Arrowroot is a substance obtained from a West Indian plant. It is used in cooking, for example for thickening sauces or in making biscuits.
- arsonists — Plural form of arsonist.
- art house — a motion-picture theater specializing in the exhibition of art films.
- art union — a lottery, often with prizes other than cash
- art-house — An art-house film is a film that is intended to be a serious artistic work rather than a piece of popular entertainment.
- artemotil — A fast-acting blood schizonticide specifically indicated for the treatment of chloroquine-resistant Plasmodium falciparum malaria and cerebral malaria cases.
- artemovsk — a city in E Ukraine.
- arteriola — (anatomy) An arteriole.
- arteriole — any of the small subdivisions of an artery that form thin-walled vessels ending in capillaries
- arternoon — Eye dialect of afternoon.
- arthrodia — a joint
- arthropod — any invertebrate of the phylum Arthropoda, having jointed limbs, a segmented body, and an exoskeleton made of chitin. The group includes the crustaceans, insects, arachnids, and centipedes
- arthroses — Plural form of arthrosis.
- arthrosis — a bone joint which enables movement
- artichoke — Artichokes or globe artichokes are round green vegetables that have fleshy leaves arranged like the petals of a flower.
- artmobile — a truck trailer outfitted to transport and exhibit works of art in areas without access to museums.
- arylation — to introduce one or more aryl groups into (a compound).
- arytenoid — denoting either of two small cartilages of the larynx that are attached to the vocal cords
- ascorbate — a salt of ascorbic acid
- ashburton — 1st Baron, Baring, Alexander.
- ashtoreth — an ancient Semitic fertility goddess, identified with Astarte and Ishtar
- aspirator — a device employing suction, such as a jet pump or one for removing fluids from a body cavity
- assertion — a positive statement, usually made without an attempt at furnishing evidence
- assertory — characterized by or relating to declaration or affirmation
- assorting — Present participle of assort.
- assortive — to distribute, place, or arrange according to kind or class; classify; sort.
- asteroids — Plural form of asteroid.
- astrocyte — any of the star-shaped cells in the tissue supporting the brain and spinal cord (neuroglia)
- astrodome — a transparent dome on the top of an aircraft, through which observations can be made, esp of the stars
- astrofell — (in the works of Spenser) an unidentified plant, commonly believed to be akin to an aster
- astrogate — (science fiction, intransitive) To astronavigate; to control and guide a spacecraft.
- astroglia — The group of star-shaped glial cells in the brain and spinal cord.
- astrolabe — an instrument used by early astronomers to measure the altitude of stars and planets and also as a navigational aid. It consists of a graduated circular disc with a movable sighting device