Something, such as a drug or therapeutic treatment, that relaxes or relieves muscular or nervous tension.(noun)
Tending to relax or to relieve tension.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "relaxant" in a sentence
"It's both a stimulant and a relaxant, which is sometimes a good combination. ""
"She could also benefit from relaxation, so we looked at magnesium, a key stress-reducer and relaxant."
"He also gave me prescriptions for industrial-strength naproxen, indomethacin, and another muscle relaxant, tizanidine, to try as new rescue meds."