2 definitions
for water shamrock
From The Collaborative International Dictionary of English v.0.48 :
bogbean \bogbean\ n.
a perennial plant of Europe and America ({Menyanthes
trifoliata) having racemes of white or purplish flowers and
intensely bitter trifoliate leaves; often rooting at the
water margin and spreading across the surface; -- called also
bog myrtle, water shamrock and marsh trefoil.
Syn: water shamrock, buckbean, bog myrtle, marsh trefoil.
[WordNet 1.5]
From WordNet (r) 2.0 :
water shamrock
n : perennial plant of Europe and America having racemes of
white or purplish flowers and intensely bitter trifoliate
leaves; often rooting at water margin and spreading
across the surface [syn: buckbean, bogbean, bog
myrtle, marsh trefoil, Menyanthes trifoliata]