13-letter words containing o, r, a, l, s
- dog-leg stair — a half-turn stair, the successive flights of which are immediately side by side and connected by an intervening platform.
- dolichosaurus — any of various extinct Cretaceous aquatic reptiles that had long necks and bodies and well-developed limbs
- dolphinariums — Plural form of dolphinarium.
- domiciliaries — of or relating to a domicile, or place of residence.
- doppelgangers — Plural form of doppelganger.
- doppler laser — a technique for measuring the shift in frequency between the source and reflected radiation of a laser.
- double spread — any pair of facing pages in a completed book, magazine, etc.
- doublespeaker — a person who uses doublespeak
- downregulates — Third-person singular simple present indicative form of downregulate.
- dragon's tail — (formerly) the descending node of the moon or a planet.
- dual controls — If a vehicle used by a driving instructor has dual controls, it has pedals on the passenger's side as well as on the driver's side to allow the driving instructor to brake should the learner try to move off when it is dangerous to do so
- durable goods — Durable goods or durables are goods such as televisions or cars which are expected to last a long time, and are bought infrequently.
- dysmenorrheal — painful menstruation.
- dysrationalia — The inability to think and behave rationally despite adequate intelligence.
- dysregulation — A failure to regulate properly.
- early closing — shop closure at earlier hour
- ebola (virus) — an RNA virus (family Filoviridae) that causes fever, internal bleeding, and, often, death
- ecclesiolatry — excessive reverence for churchly forms and traditions.
- editorialists — Plural form of editorialist.
- editorializes — Third-person singular simple present indicative form of editorialize.
- elasmobranchs — Plural form of elasmobranch.
- eleanor cross — any of the crosses erected at each place where the body of Eleanor of Castile (1246–90, Edward I's Spanish wife) rested between Nottingham (where she died) and London (where she is buried)
- electrographs — Plural form of electrograph.
- electroplates — Third-person singular simple present indicative form of electroplate.
- electrostatic — Of or relating to stationary electric charges or fields as opposed to electric currents.
- elevator shoe — a shoe designed to increase the wearer's height
- erythroblasts — Plural form of erythroblast.
- european sole — Solea solea, a tongue-shaped flatfish of the family Soleidae, also known as Dover sole or common sole: prefers shallow waters and is highly valued as a food fish
- exhilarations — Plural form of exhilaration.
- expostulatory — Of, characterized by, or exhibiting expostulation.
- extrapersonal — Outside of a person; beyond what is personal or individual.
- extrasystoles — Plural form of extrasystole.
- extrasystolia — (medicine) An alteration in the rhythm of the heart due to extrasystoles.
- extrasystolic — Relating to extrasystole, the premature contraction of the heart.
- fairy swallow — a variety of domestic fancy pigeon having blue-and-white plumage and heavily muffed feet
- false colours — a flag to which one is not entitled, flown esp in order to deceive
- false horizon — a line or plane that simulates the horizon, used in altitude-measuring devices or the like.
- false saffron — a red dye used for cotton and for colouring foods and cosmetics, or a drug obtained from the florets of this plant
- faroe islands — islands in Atlantic Ocean
- fast follower — a company that is quick to pick up good new ideas from other companies
- fat electrons — (electronics, humour) Old-time hacker David Cargill's theory on the cause of computer glitches. Your typical electricity company draws its line current out of the big generators with a pair of coil taps located near the top of the dynamo. When the normal tap brushes get dirty, they take them off line to clean them up, and use special auxiliary taps on the *bottom* of the coil. Now, this is a problem, because when they do that they get not ordinary or "thin" electrons, but the fat sloppy electrons that are heavier and so settle to the bottom of the generator. These flow down ordinary wires just fine, but when they have to turn a sharp corner (as in an integrated-circuit via), they're apt to get stuck. This is what causes computer glitches. Compare bogon, magic smoke.
- favorableness — Alternative spelling of favourableness.
- fertilisation — (chiefly, British) alternative spelling of 'fertilization'.
- festivalgoers — Plural form of festivalgoer.
- fibromuscular — (anatomy) Of or pertaining to both fibrous and muscular tissue.
- fibrovascular — composed of fibrous and conductive tissue, as in the vascular systems of higher plants: a fibrovascular bundle.
- field sparrow — a common North American finch, Spizella pusilla, found in brushy pasturelands.
- filmographies — Plural form of filmography.
- flamethrowers — Plural form of flamethrower.
- flaming sword — a cultivated bromeliad, Vriesea splendens, native to French Guiana, having long, red bracts and yellow flowers.