![]() ![]() Of or pertaining to a spire or coil like a spire pointed or shaped like a spire.To make spiral cause to move spirally.To assume a spiral form move in a spiral course.The intrinsic equation, expressing the relation between the arc σ (measured from O)and the inclination φ of the tangent at any point to the axis of x, is φ = ½ πσ. noun of a point: The origin of coördinates O corresponds to v = o, and the asymptotic points, P′, P 1, round which the curve goes in an ever-closing spiral, correspond to v = ±∞.noun A loop in a railroad line used to overcome steep grades in a mountainous region by carrying the line through a continuously rising curve.intransitive verb To cause to take a spiral form or course.intransitive verb To rise or fall with steady acceleration.intransitive verb To take a spiral form or course. ![]() adjective Printing Relating to or having a spiral binding.adjective Coiling around an axis in a constantly changing series of planes helical.adjective Circling around a center at a continuously increasing or decreasing distance.noun A continuously accelerating increase or decrease.noun The course or flight path of an object rotating on its longitudinal axis.noun Something having the form of such a curve.noun A three-dimensional curve that turns around an axis at a constant or continuously varying distance while moving parallel to the axis a helix.noun A curve on a plane that winds around a fixed center point at a continuously increasing or decreasing distance from the point.From The American Heritage® Dictionary of the English Language, 5th Edition.
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