Etymology
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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.

updated on July 18, 2021

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