12-letter words containing a, c, e, s, i, o
- prosectorial — characteristic of a prosector
- psychoactive — of or relating to a substance having a profound or significant effect on mental processes: a psychoactive drug.
- quindecagons — Plural form of quindecagon.
- rachiotomies — Plural form of rachiotomy.
- radio source — a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves.
- recessionary — of, relating to, or causing recession, especially economic recession: recessionary market pressures.
- reciprocates — to give, feel, etc., in return.
- rectirostral — (of a bird) having a straight bill.
- resuscitator — a person or thing that resuscitates.
- ribonuclease — any of the class of enzymes that catalyze the hydrolysis of RNA.
- rock jasmine — any of several alpine plants belonging to the genus Androsace, of the primrose family, having tufted leaves often in basal rosettes, and umbels of pink, red, purple, or white flowers.
- rose campion — a plant, Lychnis coronaria, of the pink family, having reddish purple flowers, and leaves covered with whitish down.
- sacrilegious — pertaining to or involving sacrilege: sacrilegious practices.
- saffron rice — a dish made from white rice and flavoured with the spice saffron
- sales office — the office or room of the department of a company responsible for selling its goods or services
- sanctionable — authoritative permission or approval, as for an action.
- sapindaceous — belonging to the Sapindaceae, the soapberry family of plants.
- scapegoating — the act or practice of assigning blame or failure to another, as to deflect attention or responsibility away from oneself.
- scapegoatism — the act or practice of assigning blame or failure to another, as to deflect attention or responsibility away from oneself.
- scatteration — the act of scattering.
- scenographic — the art of representing objects in accordance with the rules of perspective.
- scitamineous — of or relating to the Scitimanae order of plants, which includes the ginger and banana plants
- scopes trial — John Thomas, 1901–70, U.S. high-school teacher whose teaching of the Darwinian theory of evolution became a cause célèbre (Scopes Trial or Monkey Trial) in 1925.
- scots gaelic — Scottish Gaelic
- scrieveboard — the drawing board of a shipbuilder
- scrive board — a floorlike construction on which the lines of a vessel can be drawn or scribed at full size.
- scrobiculate — furrowed or pitted.
- scutellation — a scutellate state or formation; a scaly covering, as on a bird's foot.
- sea crossing — a journey by sea from one coast to another
- sea scorpion — scorpionfish.
- secobarbital — a white, odorless, slightly bitter powder, C 1 2 H 1 8 N 2 O 3 , used as a sedative and hypnotic.
- section gang — a group of workers who take care of a section of railroad track.
- section hand — a person who works on a section gang.
- section mark — section (def 16).
- sectionalism — excessive regard for sectional or local interests; regional or local spirit, prejudice, etc.
- sectionalize — to render sectional.
- seismonastic — of or relating to seismonasty
- semi-nomadic — of, relating to, or characteristic of nomads.
- semi-organic — noting or pertaining to a class of chemical compounds that formerly comprised only those existing in or derived from plants or animals, but that now includes all other compounds of carbon.
- semicolonial — partly colonial
- semicomatose — a light coma from which a person can be roused.
- semimonastic — somewhat monastic; monastic in certain respects
- semiofficial — having some degree of official authority.
- semiological — the study of signs and symbols; semiotics.
- semitropical — subtropical.
- serial comma — a comma used after the next-to-last item in a series of three or more items when the next-to-last and last items are separated by a conjunction. In the series A, B, C, or D, the comma after C is the series comma.
- seroreaction — any reaction occurring in serum.
- service road — frontage road.
- servicewoman — a woman who is a member of the armed forces of a country.
- shadow price — the calculated price of a good or service for which no market price exists