1. a common iris of the eastern United States having blue or blue-violet flowers; root formerly used medicinally; [syn: blue flag, Iris versicolor]
WordNet (r) 3.0 (2006):
Iris versicolor
n 1: a common iris of the eastern United States having blue or
blue-violet flowers; root formerly used medicinally [syn:
blue flag, Iris versicolor]