Category:Regression

Re*gres"sion (r*grsh"n), n. Etym: [l. regressio: cf. F. régression.]

Defn: the act of passing back or returning; retrogression; Retrogradation. Sir t. Browne. Edge of regression (of a surface) (geom.), the line along which a surface turns back upon itself; -- Called also a cuspidal edge. -- regression point (geom.), a cusp.