FLAG (5)

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. 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 — Flag broom, a coarse of broom, originally made of flags or rushes.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.