Definitions

from The Century Dictionary.

  • A phylum or subkingdom of metazoic animals; the echinoderms.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Zoöl.) One of the grand divisions of the animal kingdom. By many writers it was formerly included in the Radiata.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers

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