• Webster's Revised Unabridged Dictionary
    • v. t Substract To subtract; to withdraw.
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Century Dictionary and Cyclopedia
    • substract An erroneous form of subtract, common in vulgar use.
    • ***


Webster's Revised Unabridged Dictionary
F. suostraire,; L. subtus, below (from sub, under) + trahere, to draw. See Substract


In literature:

The clergyman knew someting of surgery, and he managed to substract the ball from my hip.
"By Sheer Pluck" by G. A. Henty
AMUSING SUBSTRACTION; rendered easy and plain by twenty-three appropriate engravings.
"The World's Fair" by Anonymous
But Rowland seemed to open a new rule, farther on in Butler than addition and substraction.
"Gladys, the Reaper" by Anne Beale
Fifty days every year do not make substraction.
"Geography and Plays" by Gertrude Stein
He's dat substracted he work all night.
"Airship Andy" by Frank V. Webster
And this substracted from 1 leaves .7 for the proportion of phlogisticated air in it.
"Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry" by Joseph Priestley

In science:

Recently, it is also found that homodyne measurement after single photon substraction from a CV state can play an essential role for a loophole-free nonlocality test .
D-outcome measurement for a nonlocality test
Noise temperature (thermal noise substracted) as a function of the transmission G /G0 for a quantum point contact irradiated with microwaves at 17.32 GHz (β = 2.3).
Photon-assisted transport in semiconductor nanostructures
This is again due to the infrared behavior of the spectrum for small values of ω – see Fig. 4. A proper substraction of the large background present in heavy ion collisions would benefit from this result. kt -differential measurements are expected to be more sensitive to medium effects.
Medium-induced gluon radiation and jet quenching in heavy ion collisions
We say that two such surface embeddings are stably equivalent if one can be obtained from the other by isotopy in the thickened surface, homeomorphisms of surfaces, and the addition of substraction or handles not incident to images of curves.
Virtual Knots and Links
The mean value R is automatically removed by the background substraction.
Site testing in summer at Dome C, Antarctica