12-letter words containing a, c, t, e, s
- semicomatose — a light coma from which a person can be roused.
- semidetached — partly detached.
- semimetallic — partially metallic; of the nature of a semi-metal
- semimonastic — somewhat monastic; monastic in certain respects
- semimystical — somewhat mystical; having a mystical quality to a partial degree
- semitropical — subtropical.
- sensualistic — of or pertaining to the philosophical position of sensualism
- separatrices — something that divides or separates, as the line between light and dark areas on a partially illuminated surface.
- septuplicate — a group, series, or set of seven identical copies (usually preceded by in).
- seroreaction — any reaction occurring in serum.
- service flat — an apartment with complete hotel services.
- set the pace — a rate of movement, especially in stepping, walking, etc.: to walk at a brisk pace of five miles an hour.
- sexcentenary — pertaining to 600 or a period of 600 years; marking the completion of 600 years.
- sextuplicate — a group, series, or set of six identical copies: The application is to be submitted in sextuplicate.
- shatter cone — a cone-shaped fragment of rock, probably formed by violent shock waves, as from meteoritic impact or atomic explosions
- sheet anchor — Nautical. a large anchor used only in cases of emergency.
- shell jacket — a close-fitting, semiformal jacket, with a short back, worn in the tropics in place of a tuxedo.
- shield match — a cricket match for the Sheffield Shield
- shirt jacket — a shirtlike jacket.
- short-change — to give less than the correct change to.
- shortchanged — to give less than the correct change to.
- shuttlecraft — space shuttle.
- single track — a single pair of lines so that trains can travel in only one direction at a time
- single-track — (of a railroad or section of a railroad's route) having but one set of tracks, so that trains going in opposite directions must be scheduled to meet only at points where there are sidings.
- sitka spruce — a spruce, Picea sitchensis, of western North America, having long, silvery-white needles, grown as an ornamental.
- sivapithecus — a genus of extinct Miocene primates of Asia that resemble the modern orangutan.
- skeleton car — a freight car essentially consisting of a central longitudinal girder fastened to the trucks, sometimes supplemented by one or more pairs of cross cantilevers: used for carrying logs or containers.
- skirt chaser — a womanizer.
- skirt-chaser — a womanizer.
- slash pocket — a pocket set into a garment, especially below the waistline, to which easy access is provided by an exterior, vertical or diagonal slit.
- slide-action — (of a rifle or shotgun) having a lever that when slid back and forth ejects the empty case and cocks and reloads the piece.
- slot machine — a gambling machine operated by inserting coins into a slot and pulling a handle that activates a set of spinning symbols on wheels, the final alignment of which determines the payoff that is released into a receptacle at the bottom.
- smallclothes — men's close-fitting knee breeches of the 18th and 19th centuries
- smart cookie — intelligent or sharp-witted person
- smooth-faced — beardless; smooth-shaven.
- snake doctor — South Midland and Southern U.S. a dragonfly.
- snotty-faced — having visible nasal mucus on the face
- snowshoe cat — a breed of cat with soft short hair, blue eyes, an inverted V-shaped marking on the face, and white feet
- soft chancre — chancroid.
- somatic cell — one of the cells that take part in the formation of the body, becoming differentiated into the various tissues, organs, etc.
- somatotensic — (of certain plants that are eaten as food) restoring equilibrium
- somnifacient — causing or inducing sleep.
- sophisticate — a sophisticated person.
- sorbefacient — inducing absorption
- sorosilicate — any of the silicates in which each silicate tetrahedron shares one of its four oxygen atoms with a neighboring tetrahedron, the ratio of silicon to oxygen being two to seven.
- space flight — journey into outer space
- space heater — the heating of a limited area, as a room, by means of a heater (space heater) within the area.
- space helmet — a helmet worn by astronauts while in outer space
- space travel — spaceflight of manned vehicles.
- space writer — a journalist or copywriter paid according to a space rate. Also called space man. Compare stringer (def 6).