Archimedean spiral

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Archimedean spiral

[¦är·kə¦mēd·ē·ən ′spī·rəl]
(mathematics)
A plane curve whose equation in polar coordinates (r, θ) is rm = am θ, where a and m are a positive or negative integer.
References in periodicals archive ?
Through particularizing the research method for the I tool and the II tool and by using a Archimedes's spiral as a directing curve, the evaluation and optimization model of the profile of these knives is obtained through comparing the deviations in the grinding sections of the knives.