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18-letter words containing a, c, t, g

  • sign of the zodiac — one of the twelve constellations along the path of the ecliptic.
  • significant symbol — a verbal or nonverbal gesture, as a word or smile, that has acquired a conventionalized meaning.
  • skin friction drag — aerodynamic resistance or drag due to the contact of moving air with the surface of an airplane, a glider, etc.
  • societal marketing — marketing that takes into account society's long-term welfare
  • sociotechnological — of, relating to, or signifying the combination or interaction of social and technological factors.
  • soft touch sealing — Soft touch sealing is a copolymer seal for a tank, with characteristics designed for softness, used instead of a metal seal to help avoid fire when sparks are generated.
  • sound spectrograph — an electronic device for recording a sound spectogram.
  • spaghetti junction — an interchange, usually between motorways, in which there are a large number of underpasses and overpasses and intersecting roads used by a large volume of high-speed traffic
  • specimen signature — a signature to be compared to an original signature in order to verify someone's identity
  • spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
  • spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
  • spherical triangle — a triangle formed by arcs of great circles of a sphere.
  • standing committee — a permanent committee, as of a legislature, society, etc., intended to consider all matters pertaining to a designated subject.
  • state of emergency — If a government or other authority declares a state of emergency in an area, it introduces special measures such as increased powers for the police or army, usually because of civil disorder or because of a natural disaster such as an earthquake.
  • stepping-off place — jumping-off place (def 2).
  • stinking chamomile — mayweed.
  • strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
  • stratigraphic trap — A stratigraphic trap is a rock formation that contains hydrocarbons and is sealed by other rock formations.
  • strong interaction — the interaction between gluons and between gluons and quarks that is responsible for the strong force.
  • structural geology — the branch of geology dealing with the structure and distribution of the rocks that make up the crust of the earth. Also called tectonics. Compare structure (def 7a).
  • supporting actress — an actress playing a supporting role
  • swarm intelligence — the collective behaviour of a group of animals, esp social insects such as ants, bees, and termites, that are each following very basic rules
  • swedish gymnastics — a system of passive and active exercising of muscles and joints
  • sweptwing aircraft — an aircraft which has wings that are swept (usually) backwards
  • sympathetic string — a thin wire string, as in various obsolete musical instruments, designed to vibrate sympathetically with the bowed or plucked strings to reinforce the sound.
  • take cognizance of — note, acknowledge
  • teaching assistant — a graduate student in a college or university who is the recipient of a teaching fellowship. Abbreviation: TA.
  • teaching equipment — teaching aids
  • technical sergeant — a noncommissioned officer ranking below a master sergeant and above a staff sergeant.
  • telephone exchange — a telecommunications facility to which subscribers' telephones connect, that switches calls among subscribers or to other exchanges for further routing.
  • tender loving care — considerate and kindly care, as of someone who is ill, upset, etc
  • the class struggle — the continual conflict between the capitalist and working classes for economic and political power
  • the electronic age — the electronic age began when electronic equipment, including computers came into use
  • the general public — the people in a society; people in general
  • the hunger marches — a number of processions by unemployed workers in the 1930s to protest against unemployment and deprivation
  • theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
  • to be caught short — If you are caught short or are taken short, you feel a sudden strong need to urinate, especially when you cannot easily find a toilet.
  • to fall from grace — If someone falls from grace, they suddenly stop being successful or popular.
  • to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
  • touch-in-goal line — either of the two touchlines at each end of the field between the goal line and the dead-ball line.
  • track geometry car — a railroad car equipped with instruments for providing a continuous printed record of the cross level, gauge, alignment, warp, curvature, and bank of a track.
  • transcendental ego — (in Kantian epistemology) that part of the self that is the subject and never the object.
  • translation agency — an organization that provide people to translate speech or writing into a different language
  • transmogrification — to change in appearance or form, especially strangely or grotesquely; transform.
  • triangle of forces — a triangle whose sides represent the magnitudes and directions of three forces whose resultant is zero and which are therefore in equilibrium
  • trickle irrigation — drip irrigation.
  • two-tier financing — a form of lending in which the debt is divided into two separate parts, as in a first and second mortgage held by an individual on a single property
  • ultrasonic testing — the scanning of material with an ultrasonic beam, during which reflections from faults in the material can be detected: a powerful nondestructive test method
  • ultrasonic welding — the use of high-energy vibration of ultrasonic frequency to produce a weld between two components which are held in close contact
  • unilateral neglect — a symptom of brain damage in which a person is unaware of one side of his or her body and of anything in the external world on the same side
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