1. a fungal disease of onions
The Collaborative International Dictionary of English v.0.48:
Pinkroot \Pink"root`\, n.
1. (Med.) The root of Spigelia Marilandica, used as a
powerful vermifuge; also, that of Spigelia Anthelmia.
See definition 2 (below).
(a) A perennial North American herb (Spigelia
Marilandica), sometimes cultivated for its showy red
blossoms. Called also Carolina pink, Maryland
pinkroot, and worm grass.
(b) An annual South American and West Indian plant
WordNet (r) 3.0 (2006):
n 1: a fungal disease of onions