Residual
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 16:25的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/residual ref] Recorded since 1570. From residue, itself from [https://en.wikipedia.org/w…”的新页面）
wiktionary
Recorded since 1570. From residue, itself from Old French residu (Modern résidu), from Latin residuum(“a remainder”), the neuter inflection of residuus(“remaining, left over”), perfect participle of resideō(“I remain behind”) (from re-(“back, again”) + sedeō(“I sit, I reside”).
etymonline
residual (adj.)
"formed by subtraction of one quantity from another, of or like a residuum," 1560s, from residue + -al (1), or from French résiduel, from Latin residuum "that which is left behind." By c. 1600 as "remaining, left over."
residual (n.)
1550s, in mathematics, "a residual quantity," from residual (adj.) or from residue + -al (2). Residuals "royalties for repeated performance or broadcast" is attested by 1960.
