'Flag root' definitions:

Definition of 'Flag root'

From: GCIDE
  • Flag \Flag\, n. [From Flag to hang loose, to bend down.] (Bot.) An aquatic plant, with long, ensiform leaves, belonging to either of the genera Iris and Acorus. [1913 Webster]
  • Cooper's flag, the cat-tail (Typha latifolia), the long leaves of which are placed between the staves of barrels to make the latter water-tight.
  • Corn flag. See under 2d Corn.
  • Flag broom, a coarse of broom, originally made of flags or rushes.
  • Flag root, the root of the sweet flag.
  • Sweet flag. See Calamus, n., 2. [1913 Webster]