Edge of regression

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(Geom.) the line along which a surface turns back upon itself; - called also a cuspidal edge.

See also: Regression

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
B., Surfaces at a constant distance from the edge of regression on a surface in E), DG-DS 12 (2010), 187-200.