pipewort n 1: aquatic perennial of North America and Ireland and Hebrides having translucent green leaves in a basal spiral and dense buttonlike racemes of minute white flowers [syn: {pipewort}, {Eriocaulon aquaticum}]
Pipewort \Pipe"wort`\, n. (Bot.) Any plant of a genus ({Eriocaulon}) of aquatic or marsh herbs with soft grass-like leaves. [1913 Webster]