echinus

 
Pronunciation: /ɪˈkʌɪnəs/

noun

  • 1 Zoology a sea urchin.
    • Genus Echinus, class Echinoidea: several species
  • 2 Architecture a rounded moulding below an abacus on a Doric or Ionic capital.

Origin:

late Middle English: via Latin from Greek ekhinos 'hedgehog, sea urchin'