Regression
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 18:23的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/regression ref] From regress + -ion. == etymonline == [https://www.etymonline.com…”的新页面）
wiktionary
From regress + -ion.
etymonline
regression (n.)
early 15c., "act of passing back or returning," from Latin regressionem (nominative regressio) "a going back, a return," noun of action from past-participle stem of regredi "to go back" (see regress (n.)).
From 1590s as "act of returning toward a point of departure" (of fluids, spirits, actions, etc.); from 1640s as "return (to or into) a certain state or condition, relapse." Genetics sense is by 1885.
