choy root

from The Collaborative International Dictionary of English v.0.48

Chay root \Chay" root`\ [Tamil sh[=a]ya.]
   The root of the {Oldenlandia umbellata}, native in India,
   which yieds a durable red dyestuff. [Written also {choy
   root}.]
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Choy root \Choy" root`\ (choi" r[=oo]t`).
   See {Chay root}.
   [1913 Webster]