ALL meanings of sea urchin
sea ur·chin
S s - noun sea urchin spiky round sea creature 1
- noun sea urchin 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. 1
- noun sea urchin 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. 1
- countable noun sea urchin A sea urchin is a small round sea creature that has a hard shell covered with sharp points. 0
- noun 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 0
- noun sea urchin any of various orders of echinoid echinoderms having a somewhat globular body of fused skeletal plates studded with long, calcareous, movable spines 0