Sed"a*tive (?), a. [Cf. F. s'edatif.]
Tending to calm, moderate, or tranquilize; specifically Med., allaying irritability and irritation; assuaging pain.
© Webster 1913.
Sed"a*tive, n. Med.
A remedy which allays irritability and irritation, and irritative activity or pain.
© Webster 1913.