echini

/EH1 K IY1 N IY0/
noun
  1. 1

    A sea urchin.

  2. 2

    (architecture) The rounded moulding forming the bell of the capital of the Grecian Doric style, which is of a peculiar elastic curve.

  3. 3

    (architecture) The quarter-round moulding (ovolo) of the Roman Doric style.

  4. 4

    (architecture) The egg-and-anchor or egg-and-dart moulding, because often identified with the Roman Doric capital.