The root of several European species of Iris, chiefly I. florentina. See Iris, 8.(noun)
The Century Dictionary (Public Domain)
Use "orris-root" in a sentence
"There was the muted click of high heels on the parquet of the floor -- Caris remembered, half-dreaming, that the Regent walked very quietly -- and the overwhelming waft of orris-root perfume."
"They should be placed in jars with dried lavender, cloves, woodruff leaves, orris-root, musk, pimento, and gums; a little salt must be added, and the ingredients stirred."
"A long cigarette holder between her thin lips, one putty-colored lisle stocking showing to the knee, she exhaled, together with an odor of Florentine orris-root, a ruthless vigor and appetency for pleasure."