Excipient

Ex*cip"i*ent, n. 1. An exceptor. [R.]

2. (Med.) An inert or slightly active substance used in preparing remedies as a vehicle or medium of administration for the medicinal agents. Chambers.

Ex*cip"i*ent (?), a. [L. excipients, -entis, p. pr. of exipere. See Except, v. t.] Taking an exception.