A1M3B3U1L1A1C3R1U1M3
18 points
AMBULACRUM is validvalid
[n AMBULACRA]
a radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude [n AMBULACRA]
[n AMBULACRA]
a radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude [n AMBULACRA]