Englishfor English speakers
fourfold
—
adjective
four times as great or many
a fourfold increase in the dosage
—
adverb
by a factor of four
the price of gasoline has increased fourfold over the past two years
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adjective
(= quadruple, quadruplex)
having four units or components
quadruple rhythm has four beats per measure
quadruplex wire
sampling
—
noun
(statistics) the selection of a suitable sample for study
—
noun
measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)
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noun
(= sample distribution)
items selected at random from a population and used to test hypotheses about the population