(Scotland) The acting sheriff in a Scottish county or city, like the sheriff-depute appointed by the Crown, but unlike the sheriff-depute forced to reside within his judicial district, and forbidden to take other employment.

(economics) a good that a consumer perceives as similar to another good, which decreases the demand for that other good

plural of milk substitute

plural of substitutes' bench

A substitution cipher

(chemistry) a reaction in which one functional group is replaced with another

(chemistry) in aliphatic organic chemistry, a form of substitution reaction in which the leaving functional group is replaced with a nucleophile

(chemistry) in aromatic organic chemistry, a form of substitution reaction in which the leaving functional group (normally hydrogen) is replaced with an electrophile

(cryptography) A method of encryption by which units of plaintext are substituted with ciphertext according to a regular system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing an inverse substitution.

A document in which the party to a lawsuit states that his/her attorney of record is being substituted for by another attorney or by the party acting for himself/herself (in propria persona).