circular slide rule


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circular slide rule

[′sər·kyə·lər ′slīd ‚rül]
(mathematics)
A slide rule in a circular form whose advantages over a straight slide rule are its precision, because it is equivalent to a straight slide rule many times longer than the circular slide rule's diameter, and ease of multiplication, because the scale is continuous.
References in periodicals archive ?
I frequently watched my dad whizz around his circular slide rule calculating all sorts of figures, each of which was critical to a successful flight.