- one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.
Origin of ambulacrum
Examples from the Web for ambulacral
Historical Examples of ambulacral
In this family the ambulacral plates have several pairs of pores.
Ambulacral grooves follow the center of all the arms and branches.
In this family the ambulacral plates have but three pairs of pores.
Ambulacral zones: The five areas containing the rows of tube-feet.
In both cases also we find the ocular spots at the tips of the ambulacral areas.Elementary Zoology, Second Edition
Vernon L. Kellogg
- any of five radial bands on the ventral surface of echinoderms, such as the starfish and sea urchin, on which the tube feet are situated