echinusPronunciation: /ɪˈkʌɪnəs/Definition of echinus 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'echinus in other Oxford dictionaries Definition of echinus in the US English dictionary
