'Sea urchin' definitions:

Definition of 'sea urchin'

From: WordNet
noun
Shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells

Definition of 'Sea urchin'

From: GCIDE
  • Sea urchin \Sea" ur"chin\ (Zool.) Any one of numerous species of echinoderms of the order Echinoidea.
  • Note: When living they are covered with movable spines which are often long and sharp. [1913 Webster]

Words containing 'Sea urchin'