sea urchin

noun

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.
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.

sea urchin

any echinoderm of the class Echinoidea, such as Echinus esculentus ( edible sea urchin ), typically having a globular body enclosed in a rigid spiny test and occurring in shallow marine waters

First recorded in 1585–95

I had everything from raw hamachi with sea urchin to lamb tongue.

In the indentations, sheltered from the winds, could be traced the little perforations made by the sea-urchin.

The Sea-urchin can walk by moving its spines, tilting its body along from one place to another on the bed of the sea.

There is a great deal more to know about Five-fingers; and the Sea-urchin still has his secrets which no one can explain.

Another cousin of the Starfish is the Sea-urchin, a round prickly creature rather like the burr of the sweet-chestnut tree.

Why was it not possible to prove this fact for the eggs of the sea urchin?

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