D defs.my
Entry 1 sense Webster, 1913

Echinodermata

/(ē̇*kī`nō̇*dẽr"mȧ*tȧ)/ · E·chi·no·der·ma·ta · IPA
01 n. pl. One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.
  1. 1.
    One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.(Zoöl.)