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Keeling curve
(climatology) A graph that plots the ongoing change in concentration of carbon dioxide in Earth's atmosphere since the 1950s.
hairpin curve
Synonym of hairpin bend
learning curve
A visualization of the progress of learning as function of experience. / (by extension) A measure of how much there is to learn in a restricted amount of time
compound curve
(metalworking, manufacturing) A three-dimensional shape into which a thin flat sheet of material, e.g. metal, can be formed by operations that must include stretching and/or compression, in addition to bending.
single curve
(metalworking, manufacturing) A three-dimensional shape into which a thin flat sheet of material, e.g. metal, can be formed by bending alone, without stretching or compression.
above the curve
(idiomatic) With above average innovative performance or quality, especially a trailblazer developing advances before competitors.
grade on a curve
To use a grading system based on the scale of performance of a group to normalize a right-skewed grade distribution (with more lower scores) into a bell curve, so that more can receive higher grades, regardless of their actual knowledge of the subject; to curve a grade.
（ present singular third-person ）
（ participle present ）
（ participle past ）
（ past ）
curved woodrush
horseshoe curve
A curve in the shape of a horseshoe, often on a railway, where hairpin bends cannot be used.
elliptic curve
(algebraic geometry) The algebraic set of an equation which equates the square of one variable to a reduced cubic polynomial in another variable, over some field, and such that the discriminant of the reduced cubic is non-zero.
