Hypertext Webster Gateway: "subtracting"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subtract \Sub*tract"\, v. t. [imp. & p. p. {Subtracted}; p. pr.
& vb. n. {Subtracting}.] [L. subtractus, p. p. of subtrahere
to draw from beneath, withdraw, remove; sub under + trahere
to draw. See {Trace}, v. t., and cf. {Substract}.]
To withdraw, or take away, as a part from the whole; to
deduct; as, subtract 5 from 9, and the remainder is 4.
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