[am-byuh-lak-ruh m, -ley-kruh m]
- one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.
Origin of ambulacrum
1830–40; < New Latin, Latin: alley, walking place, equivalent to ambulā- (stem of ambulāre to walk) + -crum noun suffix denoting means
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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
C19: from Latin: avenue, from ambulāre to walk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012