13-letter words containing a, d, n, t, i, o
- quartodeciman — one of a group of early Christians who observed Easter on the day of the Jewish Passover regardless of whether or not it was Sunday
- radial motion — the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by the star.
- radialization — the act of forming or arranging in a radial pattern
- radiation fog — fog produced by the nocturnal cooling of the surface boundary layer to a temperature at which its content of water vapor condenses.
- radiationless — not emitting or producing radiation
- radio contact — communication or contact by means of radio waves
- radio control — remote control by means of radio signals from a transmitter
- radio station — station (def 8).
- radioactinium — the radioactive isotope of thorium having a mass number 227 and a half-life of 18.8 days. Symbol: RdAc, Th 227.
- radiolocation — the method or process of determining the position and velocity of an object by radar.
- raison d'etat — a purely political reason for governmental action, based on the national interest and often violating principles of justice.
- raison d'etre — reason or justification for being or existence: Art is the artist's raison d'être.
- randomization — to order or select in a random manner, as in a sample or experiment, especially in order to reduce bias and interference caused by irrelevant variables; make random.
- reconsolidate — to bring together (separate parts) into a single or unified whole; unite; combine: They consolidated their three companies.
- redesignation — an act of designating.
- redial button — a button on a telephone, allowing the user to dial a number again
- reduplication — the act of reduplicating; the state of being reduplicated.
- reinvigorated — to give vigor to; fill with life and energy; energize.
- retinoic acid — a vitamin A derivative, C20H28O2, used in the treatment of acne, skin wrinkles, etc.
- revendication — the process or act of revendicating
- revindication — the act of vindicating.
- road accident — a traffic accident involving vehicles, pedestrians or cyclists
- robot dancing — a dance of the 1980s characterized by jerky mechanical movements
- rogation days — Usually, rogations. Ecclesiastical. solemn supplication, especially as chanted during procession on the three days (Rogation Days) before Ascension Day.
- romantic lead — a person who plays the main character in a romantic film or play
- ruggedization — the act or process of making something rugged
- saint leonard — a city in S Quebec, in E Canada: suburb of Montreal.
- santo domingo — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- scarfed joint — a lapped joint between two pieces of timber made by notching or grooving the ends and strapping, bolting, or gluing the two pieces together
- sectionalized — divided into sections
- sedimentation — the deposition or accumulation of sediment.
- self-anointed — to rub or sprinkle on; apply an unguent, ointment, or oily liquid to.
- self-donation — an act or instance of presenting something as a gift, grant, or contribution.
- sex addiction — an addiction to sexual activity
- sex education — Sex education is education in schools on the subject of sexual activity and sexual relationships.
- shadowcasting — the enhancement of images by the casting of shadows
- skateboarding — a device for riding upon, usually while standing, consisting of a short, oblong piece of wood, plastic, or aluminum mounted on large roller-skate wheels, used on smooth surfaces and requiring better balance of the rider than the ordinary roller skate does.
- smoking stand — an ashtray mounted on a low pedestal, often placed next to an armchair, sofa, etc.
- soda fountain — a counter, as in a restaurant or drugstore, at which sodas, ice cream, light meals, etc., are served.
- solidungulate — having a single, undivided hoof on each foot, as a horse.
- sporting lady — a prostitute.
- spread option — spread (def 25b).
- standard coin — a coin having value in bullion at least equal to its face value.
- standing chop — (in an axemen's competition) a chop with the log standing upright
- standing crop — the totality of living things in an ecosystem at a given time.
- standing joke — If something is a standing joke among a group of people, they often make jokes about it.
- standing room — space in which to stand, as in a theater, stadium, or the like.
- stannic oxide — a white, amorphous, water-insoluble powder, SnO 2 , used chiefly in the manufacture of ceramic glazes and glass, and of polishing powders for metal, glass, and marble.
- state of mind — mental condition, mood
- subdelegation — a group or body of delegates: Our club sent a delegation to the rally.