Definition of echinus in US English:

echinus

noun

  • 1Zoology
    A sea urchin.

    Genus Echinus, class Echinoidea: several species, including the common European edible sea urchin (E. esculentus)

  • 2Architecture
    A rounded molding below an abacus on a Doric or Ionic capital.

Origin

Late Middle English: via Latin from Greek ekhinos ‘hedgehog, sea urchin’.

Pronunciation

echinus

/əˈkīnəs//əˈkaɪnəs/