17-letter words containing si
- dissipation trail — a clear rift left behind an aircraft flying through a thin cloud layer.
- division of labor — a production process in which a worker or group of workers is assigned a specialized task in order to increase efficiency.
- do one's business — an occupation, profession, or trade: His business is poultry farming.
- ductus arteriosis — a fetal blood vessel that connects the left pulmonary artery directly to the descending aorta, normally closing after birth.
- early closing day — a day on which most shops in a town or area close after lunch
- east siberian sea — a part of the Arctic Ocean, between Wrangel Island and the New Siberian Islands. 352,520 sq. mi. (913,000 sq. km).
- ectoparasiticides — Plural form of ectoparasiticide.
- electroanesthesia — Anesthesia induced by cranial electrotherapy stimulation.
- electroconvulsive — Of or relating to the treatment of mental illness by the application of electric shocks to the brain.
- electrodeposition — The deposition of a metal on a cathode during electrolysis; used as a method of purification.
- electrophysiology — The branch of physiology that deals with the electrical phenomena associated with nervous and other bodily activity.
- electropositivity — (uncountable) the condition of being electropositive.
- emergency session — an urgent meeting held by parliament, ministers, etc. to discuss what measures should be taken to deal with an emergency
- emission spectrum — the continuous spectrum or pattern of bright lines or bands seen when the electromagnetic radiation emitted by a substance is passed into a spectrometer. The spectrum is characteristic of the emitting substance and the type of excitation to which it is subjected
- emissions trading — the buying and selling of allowances for pollutant emissions
- energy conversion — the process of changing one form of energy into another, such as nuclear energy into heat or solar energy into electrical energy
- ethnomusicologist — A researcher in the field of ethnomusicology.
- exclusionary rule — a legal rule that evidence obtained illegally, as from a search without a warrant, may not be introduced at trial
- executive mansion — the White House (in Washington, D.C.), official home of the President of the U.S.
- executive session — a session of the Senate for the discussion of executive business, such as the ratification of treaties: formerly held in secret
- exhaust emissions — Exhaust emissions are substances that come out of an exhaust system into the atmosphere.
- explosion welding — the welding of two parts forced together by a controlled explosion
- explosive forming — a rapid method of forming a metal object in which components are made by subjecting the metal to very high pressures generated by a controlled explosion
- extension courses — courses offered to outsiders by an educational establishment
- facsimile catalog — a catalog that includes small reproductions of the items listed, as paintings, slides, designs, or the like.
- facsimile machine — a machine which transmits and receives documents in facsimile transmission
- fan-assisted oven — an electric oven in which a fan circulates the air and which uses both top and bottom heat
- feasibility study — (systems analysis) Part of the systems develpment life cycle which aims to determine whether it is sensible to develop some system. The most popular model of feasibility study is "TELOS", standing for Technical, Economic, Legal, Operational, Schedule. Technical Feasibility: does the technology exist to implement the proposed system? Is it a practical proposition? Economic Feasibility: is the system cost-effective? Do benefits outweigh costs? Legal Feasibility: is there any conflict between the proposed system and legal requirements, e.g. the Data Protection Act? Operational Feasibility: are the current work practices and procedures adequate to support the new system? Schedule Feasibility: can the system be developed in time? After the feasibility study, the requirements analysis should be carried out.
- fire commissioner — the senior or officer at state or provincial level in charge of fire prevention and fire safety
- forensic evidence — evidence obtained by the use of science, for example DNA evidence, etc
- forensic medicine — the application of medical knowledge to questions of civil and criminal law, especially in court proceedings.
- fractal dimension — (mathematics) A common type of fractal dimension is the Hausdorff-Besicovich Dimension, but there are several different ways of computing fractal dimension. Fractal dimension can be calculated by taking the limit of the quotient of the log change in object size and the log change in measurement scale, as the measurement scale approaches zero. The differences come in what is exactly meant by "object size" and what is meant by "measurement scale" and how to get an average number out of many different parts of a geometrical object. Fractal dimensions quantify the static *geometry* of an object. For example, consider a straight line. Now blow up the line by a factor of two. The line is now twice as long as before. Log 2 / Log 2 = 1, corresponding to dimension 1. Consider a square. Now blow up the square by a factor of two. The square is now 4 times as large as before (i.e. 4 original squares can be placed on the original square). Log 4 / log 2 = 2, corresponding to dimension 2 for the square. Consider a snowflake curve formed by repeatedly replacing ___ with _/\_, where each of the 4 new lines is 1/3 the length of the old line. Blowing up the snowflake curve by a factor of 3 results in a snowflake curve 4 times as large (one of the old snowflake curves can be placed on each of the 4 segments _/\_). Log 4 / log 3 = 1.261... Since the dimension 1.261 is larger than the dimension 1 of the lines making up the curve, the snowflake curve is a fractal. [sci.fractals FAQ].
- francis of assisi — Saint (Giovanni Francesco Bernardone) 1182?–1226, Italian friar: founder of the Franciscan order.
- from side to side — movement: back and forth
- gaseous diffusion — the passage of gas through microporous barriers, a technique used for isotope separation, especially in the preparation of fuel for nuclear reactors.
- gender expression — the external expression of gender roles, as through socially defined behaviors and ways of dressing.
- general admission — an admission charge for unreserved seats at a theatrical performance, sports event, etc.
- general paralysis — a syphilitic brain disorder characterized by chronic inflammation and degeneration of cerebral tissue resulting in mental and physical deterioration.
- give the business — an occupation, profession, or trade: His business is poultry farming.
- go by the wayside — to be put aside on account of something more urgent
- graduated pension — the money that an employee receives after retirement if they have paid into the graduated pension scheme
- ground provisions — starchy vegetables, esp root crops and plantains
- hall of residence — Halls of residence are buildings with rooms or flats, usually built by universities or colleges, in which students live during the term.
- hammer and sickle — the emblem of the Soviet Union, adopted in 1923 and consisting of an insignia of a hammer with its handle across the blade of a sickle and a star above.
- harmonic analysis — the calculation of Fourier series and their generalization.
- high commissioner — a representative of one sovereign member of the Commonwealth of Nations in the country of another, having a rank and responsibilities generally similar to those of an ambassador.
- high-density disk — a computer storage disk capable of holding more than 720 kilobytes of data
- high-tensile wire — wire which can withstand great strain without breaking or becoming deformed
- homo floresiensis — a possible species of very small, primitive human: its fossils were discovered on the Indonesian island of Flores in 2003.
- homogentisic acid — an intermediate compound in the metabolism of tyrosine and of phenylalanine, found in excess in the blood and urine of persons affected with alkaptonuria.