Re·sid·u·al a.  Pertaining to a residue; remaining after a part is taken.
 Residual air Physiol., that portion of air contained in the lungs which can not be expelled even by the most violent expiratory effort. It amounts to from 75 to 100 cubic inches.  Cf. Supplemental air, under Supplemental.
 Residual error. Mensuration See Error, 6 (b).
 Residual figure Geom., the figure which remains after a less figure has been taken from a greater one.
 Residual magnetism Physics, remanent magnetism. See under Remanent.
 Residual product, a by product, as cotton waste from a cotton mill, coke and coal tar from gas works, etc.
 Residual quantity Alg., a binomial quantity the two parts of which are connected by the negative sign, as a-b.
 Residual root Alg., the root of a residual quantity, as √(a-b).


 Rem·a·nent, a.  Remaining; residual.
    That little hope that is remanent hath its degree according to the infancy or growth of the habit.   --Jer. Taylor.
 Remanent magnetism Physics, magnetism which remains in a body that has little coercive force after the magnetizing force is withdrawn, as soft iron; -- called also residual magnetism.

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