15-letter words containing r, u, t, a
- rhesus negative — relating to blood not containing Rhesus antigen D
- rheumatic fever — a serious disease, associated with streptococcal infections, usually affecting children, characterized by fever, swelling and pain in the joints, sore throat, and cardiac involvement.
- rheumatism-root — spotted wintergreen.
- rigel kentaurus — Alpha Centauri.
- right of asylum — the right of alien fugitives to protection or nonextradition in a country or its embassy.
- right-hand buoy — a distinctive buoy marking the side of a channel regarded as the right, or starboard, side.
- rightabout-face — a turning directly about so as to face in the opposite direction
- rigil kentaurus — Astronomy. Alpha Centauri.
- rime suffisante — full rhyme.
- ritualistically — adherence to or insistence on ritual.
- robert guiscard — Robert [French raw-ber] /French rɔˈbɛr/ (Show IPA), (Robert de Hauteville) c1015–85, Norman conqueror in Italy.
- rocket launcher — a tube attached to a weapon for the launching of rockets.
- rocky mountains — mountain range in USA and Canada
- rogation sunday — the fifth Sunday after Easter; it sees the start of the supplications that are continued during the following Monday, Tuesday and Wednesday
- rotary debugger — (Commodore) Essential equipment for those late-night or early-morning debugging sessions. Mainly used as sustenance for the hacker. Comes in many decorator colours, such as Sausage, Pepperoni, and Garbage.
- rough breathing — the symbol (ʿ) used in the writing of Greek to indicate aspiration of the initial vowel or of the ρ (rho) over which it is placed.
- round character — a character in fiction whose personality, background, motives, and other features are fully delineated by the author.
- roundaboutation — circumlocution
- roundaboutility — roundaboutness
- routeing domain — (networking) (US "routing") A set of routers that exchange routeing information within an administrative domain.
- rubaiyat stanza — a quatrain patterned after those in The Rubáiyát of Omar Khayyám, of iambic pentameter and rhyming aaba.
- ruby grapefruit — a grapefruit with red flesh
- rudimentariness — the state or quality of being rudimentary
- ruffle feathers — to cause upset or offence
- rump parliament — the remnant of the Long Parliament established by the expulsion of the Presbyterian members in 1648, dismissed by force in 1653, and restored briefly in 1659–60.
- run the gantlet — to be punished by means of the gantlet
- runabout ticket — a rail ticket that allows unlimited travel within a specified area for a limited period of time (for example one day, a weekend, three days, etc)
- russell's attic — (mathematics) An imaginary room containing countably many pairs of shoes (i.e. a pair for each natural number), and countably many pairs of socks. How many shoes are there? Answer: countably many (map the left shoes to even numbers and the right shoes to odd numbers, say). How many socks are there? Also countably many, we want to say, but we can't prove it without the Axiom of Choice, because in each pair, the socks are indistinguishable (there's no such thing as a left sock). Although for any single pair it is easy to select one, we cannot specify a general method for doing this.
- russian thistle — a saltwort, Salsola kali tenuifolia, that has narrow, spinelike leaves, a troublesome weed in the central and western U.S.
- rusty blackbird — a North American blackbird, Euphagus carolinus, the male of which has plumage that is uniformly bluish-black in the spring and rusty-edged in the fall.
- rutherford atom — the atom postulated as analogous to the solar system, with electrons revolving around a small, central, positive nucleus that constitutes practically the entire mass of the atom
- sagittal suture — a serrated line on the top of the skull that marks the junction of the two parietal bones
- salisbury steak — ground beef, sometimes mixed with other foods, shaped like a hamburger patty and broiled or fried, often garnished or served with a sauce.
- samuel prescott — Samuel, 1751–77, U.S. patriot during the American Revolution: rode with Paul Revere and William Dawes to warn Colonists that British troops were marching from Boston, April 18, 1775.
- santa gertrudis — one of an American breed of beef cattle, developed from Shorthorn and Brahman stock for endurance to torrid temperatures.
- sarcenchymatous — relating to the connective tissue of some sponges
- sartor resartus — a satirical work (1833–34) by Carlyle.
- saturated vapor — a vapor whose temperature and pressure are such that any compression of its volume at constant temperature causes it to condense to liquid at a rate sufficient to maintain a constant pressure.
- sausage turning — turning of members to resemble a continuous row of sausages flattened at the ends.
- sb's trump card — Your trump card is something powerful that you can use or do, which gives you an advantage over someone.
- scaling circuit — an electronic device or circuit that aggregates electric pulses and gives a single output pulse for a predetermined number of input pulses
- scatter cushion — Scatter cushions are small cushions for use on sofas and chairs.
- schola cantorum — an ecclesiastical choir or choir school.
- sclerodermatous — Zoology. covered with a hardened tissue, as scales.
- security camera — closed-circuit TV camera
- security thread — a colored thread running through the paper of a piece of paper money, used to deter counterfeiting.
- security threat — a threat to the security of a country
- self-authorized — given or endowed with authority: an authorized agent.
- self-caricature — a picture, description, etc., ludicrously exaggerating the peculiarities or defects of persons or things: His caricature of the mayor in this morning's paper is the best he's ever drawn.
- self-regulating — adjusting, ruling, or governing itself without outside interference; operating or functioning without externally imposed controls or regulations: a self-regulating economy; the self-regulating market.