A phylum of marine invertebrates which includes starfishes, sea urchins, brittlestars, crinoids, and sea cucumbers. They have fivefold radial symmetry, a calcareous skeleton, and tube feet operated by fluid pressure.
More example sentences
- The superphylum Deuterostomia contains the diverse phyla Chordata and Echinodermata and the minor phyla Hemichordata and Urochordata.
- Sea cucumbers, invertebrate animals of the phylum Echinodermata, might hold out some hope for the afflicted.
- Crinoids are a class of the phylum Echinodermata, which includes living starfishes, sand dollars and sea urchins, as well as approximately six hundred living species of crinoids.
Definition of Echinodermata in:
- The US English dictionary