the rootstock of the orris: pulverized and used in perfumery, tooth powders, etc.
orrisroot in American English
(ˈɔrɪsˌruːt, -ˌrut, ˈɑr-)
noun
the rootstock of the orris, used in perfumery, medicine, etc.
Word origin
[1590–1600; orris1 + root1]This word is first recorded in the period 1590–1600. Other words that entered Englishat around the same time include: class, fixture, jolt, radius, volunteer