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SI
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I. (noun)
Sense 1
Meaning:
The syllable naming the seventh (subtonic) note of any musical scale in solmization
Synonyms:
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("si" is a kind of...):
solfa syllable (one of the names for notes of a musical scale in solmization)
Sense 2
Meaning:
A complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
Example:
Today the United States is the only country in the world not totally committed to the Systeme International d'Unites
Synonyms:
International System; International System of Units; SI; SI system; SI unit; Systeme International; Systeme International d'Unites
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("SI" is a kind of...):
metric system (a decimal system of weights and measures based on the meter and the kilogram and the second)
Sense 3
Meaning:
A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
Synonyms:
atomic number 14; Si; silicon
Classified under:
Hypernyms ("Si" is a kind of...):
chemical element; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)
semiconducting material; semiconductor (a substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities)
Holonyms ("Si" is a substance of...):
quartz (a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities)
clay (a very fine-grained soil that is plastic when moist but hard when fired)
feldspar; felspar (any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium)
granite (plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz)
sand (a loose material consisting of grains of rock or coral)
silicone; silicone polymer (any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulation)
Context examples:
It is calculated by averaging the radiation dose delivered over x,y and z directions and expressed in the SI unit of Gray (Gy).
(Computed Tomography Dose Index Volume, NCI Thesaurus)
A unit of volume accepted for use with the SI and equal to one millionth of a liter (10E-6 liter).
(Microliter, NCI Thesaurus)
A SI derived unit of pressure equivalent to one thousandth of one pascal.
(Millipascal, NCI Thesaurus)
If it come to Horace, I have a line in my mind: _Loquaces si sapiat_—How doth it run?
(The White Company, by Sir Arthur Conan Doyle)
The non-SI unit of mass equal to 24 grains, 1/20 Troy ounce or approximately 1.5552 gram.
(Pennyweight, NCI Thesaurus)
Researchers in Barabási's lab studied the nematode brain, which has been mapped neuron by neuron, synapse by synapse.
(Fundamental Rules for How The Brain Controls Movement, The Titi Tudorancea Bulletin)
A non-SI unit of energy equal to the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at a constant pressure of one atmosphere.
(British Thermal Unit International Table, NCI Thesaurus)
A SI derived unit of quantity of electricity, equal to the quantity of charge transferred in one second across a conductor in which there is a constant current of one ampere.
(Coulomb, NCI Thesaurus)
A unit of amount of substance, one of the seven base units of the International System of Units (Systeme International d'Unites, SI).
(Mole, NCI Thesaurus)
A SI derived unit of pressure equivalent to one newton per square meter or 10 bars or to 1.45x10E-4 pounds per square inch.
(Pascal, NCI Thesaurus)
