slate-pencil sea urchin

slate-pencil sea urchin
noun
: a large purple sea urchin (Heterocentrotus mammillatus) having stout heavy spines that resemble slate pencils

Useful english dictionary. 2012.

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Look at other dictionaries:

  • Sea urchin — Taxobox name = Sea urchin image width = 250px image caption = Sea urchins, Sterechinus neumayeri regnum = Animalia phylum = Echinodermata subphylum = Echinozoa classis = Echinoidea classis authority=Leske, 1778 subdivision ranks = Subclasses… …   Wikipedia

  • sea urchin — 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… …   Universalium

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