3. The office or authority of one acting for another; delegated
authority. [R.] Shak.
4. (Civil Law) The designation of a person in a will to take a devise
or legacy, either on failure of a former devisee or legatee by
incapacity or unwillingness to accept, or after him. Burrill.
5. (Theol.) The doctrine that Christ suffered vicariously, being
substituted for the sinner, and that his sufferings were expiatory.
6. (Chem.) The act or process of substituting an atom or radical for
another atom or radical; metathesis; also, the state of being so
substituted. See Metathesis.
Sub`sti*tu"tion*al (?), a. Of or pertaining to substitution; standing
in the place of another; substituted. -- Sub`sti*tu"tion*al*ly, adv.
Sub`sti*tu"tion*a*ry (?), a. Of or pertaining to substitution;
substitutional.
Sub"sti*tu`tive (?), a. [Cf. F. substitutif, L. substitutivus
conditional.] Tending to afford or furnish a substitute; making
substitution; capable of being substituted. Bp. Wilkins.
Sub*stract" (?), v. t. [F. suostraire; L. subtus below (from sub under)
+ trahere to draw. See Substract.] To subtract; to withdraw. [Obs.]
Barrow.
Sub*strac"tion (?), n. [OF. substraction, F. soustraction. See
Subtract.] 1. Subtraction; deduction. [Obs.]