Толковый словарь английского языка Oxford English Reference - null
Null
null
adj. & n. --adj. 1 (esp. null and void) invalid; not binding. 2 non-existent; amounting to nothing. 3 having or associated with the value zero. 4 Computing a empty; having no elements (null list). b all the elements of which are zeros (null matrix). 5 without character or expression. --n. a dummy letter in a cipher. Phrases and idioms null character Computing a character denoting nothing, usu. represented by a zero. null hypothesis a hypothesis suggesting that the difference between statistical samples does not imply a difference between populations. null instrument an instrument used by adjustment to give a reading of zero. null link Computing a reference incorporated into the last item in a list to indicate there are no further items in the list. Etymology: F nul nulle or L nullus none f. ne not + ullus any
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1.
I. adjective see: no Date: circa 1567 having no legal or binding force ; invalid, amounting to nothing ; nil, having no value ; insignificant, 4. having no elements , having zero as a limit , having all elements equal to zero, 5. indicating usually by a zero reading on a scale when a given quantity (as current or voltage) is zero or when two quantities are equal, being or relating to a method of measurement in which an unknown quantity (as of electric current) is compared with a known quantity of the same kind and found equal by a ~ detector, of, being, or relating to zero, zero 1c, II. noun Date: 1605 zero 3a(1), 2. a condition of a radio receiver when minimum or zero signal is received, a minimum or zero value of an electric current or of a radio signal, III. transitive verb Date: 1643 to make ~ ...Толковый словарь английского языка
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