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sea' ur"chin

1. any echinoderm of the class Echinoidea, having a somewhat globular or discoid form, and a shell composed of many calcareous plates covered with projecting spines.
2. a tall evergreen shrub or small tree, Hakea laurina, of Australia, having narrow leaves and dense, globe-shaped clusters of crimson flowers with long yellow stamens.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

seatworksea wall
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